RFR: 8004179: test/java/lang/management/ThreadMXBean/SynchronizerLockingThread.java doesn't clean up

[Jaroslav Bachorik]

Please, review the following patch:
http://cr.openjdk.java.net/~jbachorik/8004179/webrev.01

Issue: https://bugs.openjdk.java.net/browse/JDK-8004179

It addresses the problem of the test not properly cleaning up the
created threads at exit. It does so by running the test in "othervm"
mode. Although it is possible to modify the test to cleanup the threads
at exit it would add more complexity to the test while achieving the
same result as running the test in "othervm" mode.

Thanks,

-JB -