Regression caused by JDK-8147388: Add diagnostic commands to attach JVMTI agent.

The failure happened on be osx only in RT-baseline 2016/02/19

----------System.out:(83/5271)----------
[TestNG] Running:
  serviceability/dcmd/jvmti/LoadAgentDcmdTest.java

test LoadAgentDcmdTest.cli(): failure
java.lang.RuntimeException: java.io.FileNotFoundException: Could not find /export/local/aurora/CommonData/JDK_DIR/lib/x86_64/libinstrument.so
at LoadAgentDcmdTest.run(LoadAgentDcmdTest.java:98)
at LoadAgentDcmdTest.cli(LoadAgentDcmdTest.java:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:520)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
at org.testng.TestNG.run(TestNG.java:1057)
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:163)
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:147)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:520)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:92)
at java.lang.Thread.run(Thread.java:804)
Caused by: java.io.FileNotFoundException: Could not find /export/local/aurora/CommonData/JDK_DIR/lib/x86_64/libinstrument.so
at LoadAgentDcmdTest.getLibInstrumentPath(LoadAgentDcmdTest.java:66)
at LoadAgentDcmdTest.run(LoadAgentDcmdTest.java:86)
... 30 more