tools/launcher/FXLauncherTest.java fails intermittently at Windows platform.

Failures happened to different testcase.

------------------------ test log 1 ----------------------------
test# 3- Main method: public static void main(String[] args) { launch(args); }
Main-Class: helloworld.ExtHello
renaming fxtest.jar to testExtendFXApp_useCP_noJAC-3-fxtest.jar
FAIL: testExtendFXApp_useCP_noJAC:3 : test with helloworld.ExtHello
Test static void FXLauncherTest.testExtendFXApp() throws java.lang.Exception failed: java.lang.reflect.InvocationTargetException
----begin detailed exceptions----
java.lang.reflect.InvocationTargetException
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:502)
at TestHelper.run(TestHelper.java:205)
at FXLauncherTest.main(FXLauncherTest.java:401)
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:502)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:218)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Exception: Failed: testExtendFXApp_useCP_noJAC:3
at FXLauncherTest.checkStatus(FXLauncherTest.java:204)
at FXLauncherTest.testExtendFXApp(FXLauncherTest.java:308)
at FXLauncherTest.testExtendFXApp(FXLauncherTest.java:269)
... 12 more
----end detailed exceptions----

------------------------ test log 2 ----------------------------
_____________________________________________
test# 8- Main method:
Main-Class: helloworld.HelloWorld
renaming fxtest.jar to testBasicFXApp_noJAC-8-fxtest.jar
FAIL: testBasicFXApp_noJAC:8 : test with helloworld.HelloWorld
Test static void FXLauncherTest.testBasicFXApp() throws java.lang.Exception failed: java.lang.reflect.InvocationTargetException
----begin detailed exceptions----
java.lang.reflect.InvocationTargetException
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:502)
at TestHelper.run(TestHelper.java:205)
at FXLauncherTest.main(FXLauncherTest.java:401)
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:502)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:218)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.Exception: Failed: testBasicFXApp_noJAC:8
at FXLauncherTest.checkStatus(FXLauncherTest.java:204)
at FXLauncherTest.testBasicFXApp(FXLauncherTest.java:257)
at FXLauncherTest.testBasicFXApp(FXLauncherTest.java:221)
... 12 more
----end detailed exceptions----