[TESTBUG] Logging tests are failing intermittently on windows when executed by JPRT

runtime/logging/DefaultMethodsTest.java is failing for pushing jobs on jdk9/hs
This is preventing the synching of jdk9/hs with jdk9/dev (See output below)

Additionally, runtime/logging/ItablesTest.java fails, where "vtable index" does not appear in the output. (Sample output below from C:\jprt\T\P1\224334.rprotaci\testproduct\windows_i586_6.2-fastdebug)

================================
java.lang.RuntimeException: 'Slots that need filling:' missing from stdout/stderr

at jdk.test.lib.OutputAnalyzer.shouldContain(OutputAnalyzer.java:138)
at DefaultMethodsTest.main(DefaultMethodsTest.java:41)
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.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:218)
at java.lang.Thread.run(Thread.java:804)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test


TEST RESULT: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: 'Slots that need filling:' missing from stdout/stderr

 =====
 java.lang.RuntimeException: 'vtable index ' missing from stdout/stderr

 at jdk.test.lib.OutputAnalyzer.shouldContain(OutputAnalyzer.java:138)
 at ItablesTest.main(ItablesTest.java:46)
 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.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:218)
 at java.lang.Thread.run(Thread.java:806)

 JavaTest Message: Test threw exception: java.lang.RuntimeException
 JavaTest Message: shutting down test


TEST RESULT: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: 'vtable index ' missing from stdout/stderr