环境：
Jenkins 搭建在 Mac 服务器上面，安装在 tomcat 当中以 webapp 方式启动。
mac 系统版本：10.9.4
xctool 版本：0.2.2
jenkins 版本：1.598
现象：
在 mac 本机执行测试通过，使用 jenkins shell 方式执行失败，模拟器启动后显示黑屏。
测试命令：
xctool -project Sample.xcodeproj -scheme SampleTests -sdk iphonesimulator test -freshInstall -freshSimulator
错误日志如下：
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iOS deployment target '8.1' for architecture 'i386' and variant 'normal' is greater than the maximum value '8.0.99' for the Simulator - iOS 8.0 SDK.
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~ Write auxiliary files (3 ms)
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/bin/mkdir -p /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build
write-file /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build/SampleTests-project-headers.hmap
write-file /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build/SampleTests-generated-files.hmap
write-file /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build/SampleTests-all-target-headers.hmap
write-file /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build/SampleTests-own-target-headers.hmap
write-file /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build/SampleTests.hmap
write-file /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build/SampleTests-all-non-framework-target-headers.hmap
/bin/mkdir -p /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build/Objects-normal/i386
write-file /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Intermediates/Sample.build/Debug-iphonesimulator/SampleTests.build/Objects-normal/i386/SampleTests.LinkFileList
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~ Create product structure (0 ms)
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/bin/mkdir -p /Users/wangmy/Library/Developer/Xcode/DerivedData/Sample-haasvciuwqzzcociidumavsvdwoo/Build/Products/Debug-iphonesimulator/SampleTests.xctest
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~ Process Info.plist (3 ms)
~ Compile CSSTests.mm (1461 ms)
~ Compile HistoryManageTests.mm (1002 ms)
~ Compile RenderTests.mm (1260 ms)
~ Compile ERTLuaCoreUnitTests.mm (616 ms)
~ Compile ERTCoreTests.mm (346 ms)
~ Link SampleTests (30 ms)
~ Generate SampleTests.xctest.dSYM (53 ms)
~ Touch SampleTests.xctest (2 ms)
0 errored, 1 warning (1566 ms)
[Info] Collecting info for testables... (1584 ms)
run-test SampleTests.xctest (iphonesimulator8.0, application-test)
[Warning] Tried to install the test host app 'net.light.sample' but failed. (63 ms)
[Info] Preparing test environment failed; will retry 2 more times (0 ms)
[Info] Verified iOS Simulators... (0 ms)
[Info] Shut down iOS Simulator... (0 ms)
[Info] Stopped any existing iOS simulator jobs to get a fresh simulator. (123 ms)
[Info] Reset iOS simulator content and settings at path "/Users/wangmy/Library/Developer/CoreSimulator/Devices/2EE9285F-1031-4A63-BE94-F1395C79C083/data" (541 ms)
[Warning] Tried to install the test host app 'net.light.sample' but failed. (15 ms)
[Info] Preparing test environment failed; will retry 1 more time (0 ms)
[Info] Verified iOS Simulators... (0 ms)
[Info] Shut down iOS Simulator... (0 ms)
[Info] Stopped any existing iOS simulator jobs to get a fresh simulator. (128 ms)
[Info] Reset iOS simulator content and settings at path "/Users/wangmy/Library/Developer/CoreSimulator/Devices/2EE9285F-1031-4A63-BE94-F1395C79C083/data" (592 ms)
[Warning] Tried to install the test host app 'net.light.sample' but failed. (15 ms)
[Warning] Preparing test environment failed. (0 ms)
-[TEST_BUNDLE FAILED_TO_START]
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There was a problem starting the test bundle: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[TEST_BUNDLE FAILED_TO_START] (0 ms) (0)
-[CSSTests testCSSCreate]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[CSSTests testCSSCreate] (0 ms) (1)
-[CSSTests testCSSParser]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[CSSTests testCSSParser] (0 ms) (2)
-[CSSTests testColorParser]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[CSSTests testColorParser] (0 ms) (3)
-[CSSTests testPerformanceExample]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[CSSTests testPerformanceExample] (0 ms) (4)
-[ERTCoreTests testExample]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[ERTCoreTests testExample] (0 ms) (5)
-[ERTCoreTests testPerformanceExample]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[ERTCoreTests testPerformanceExample] (0 ms) (6)
-[HistoryManageTests testHistoryManage]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[HistoryManageTests testHistoryManage] (0 ms) (7)
-[RenderTests testCreateRender]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[RenderTests testCreateRender] (0 ms) (8)
-[RenderTests testPerformanceExample]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[RenderTests testPerformanceExample] (0 ms) (9)
-[RenderTests testRenderTree]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[RenderTests testRenderTree] (0 ms) (10)
-[RenderTests testSetInnerHtml]
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
----|---------------------------------------------------------------------------
X -[RenderTests testSetInnerHtml] (0 ms) (11)
0 passed, 0 failed, 12 errored, 12 total (1 ms)
Failures:
0) -[TEST_BUNDLE FAILED_TO_START] (SampleTests.xctest)
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There was a problem starting the test bundle: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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1) -[CSSTests testCSSCreate] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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2) -[CSSTests testCSSParser] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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3) -[CSSTests testColorParser] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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4) -[CSSTests testPerformanceExample] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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5) -[ERTCoreTests testExample] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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6) -[ERTCoreTests testPerformanceExample] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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7) -[HistoryManageTests testHistoryManage] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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8) -[RenderTests testCreateRender] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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9) -[RenderTests testPerformanceExample] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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10) -[RenderTests testRenderTree] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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11) -[RenderTests testSetInnerHtml] (SampleTests.xctest)
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Test did not run: Simulator 'iPhone 4s' was not prepared: Failed for unknown reason.
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** TEST FAILED: 0 passed, 0 failed, 12 errored, 12 total ** (77259 ms)