RFR: 8081652: java/lang/management/ThreadMXBean/ThreadMXBeanStateTest.java timed out intermittently

[Daniil Titov]

Please review a change [1] that  fixes an intermittent test timeout. 

The main logic of the test has this basic structure:

try {
  // lots of thread state manipulation of target
}
finally {
  thread.getLog();
}

and as David noticed in his comment  ( the last comment in [2] )  if an exception occurs anywhere
in the try block we can hang waiting for the join() in getLog() because we haven't executed the logic that
tells the thread to terminate.

Testing:  Running a modified test that explicitly throws a runtime exception inside the try block shows the fix solves the problem.
                 Mach5 tier1-tier3 tests passed. Mach5 tier4-tier5 tests are in progress.

[1] http://cr.openjdk.java.net/~dtitov/8081652/webrev.01/ 
[2] https://bugs.openjdk.java.net/browse/JDK-8081652 

Thank you,
Daniil