Review request for 8022208: Intermittent test failures in java/lang/Thread/ThreadStateTest.java

[Mandy Chung]

https://bugs.openjdk.java.net/browse/JDK-8022208

Webrev at:
   http://cr.openjdk.java.net/~mchung/jdk8/webrevs/8022208/webrev.00/

The retry loop in checking the thread state assumes that the thread 
state is in RUNNABLE state which isn't always the case (it could be any 
other state).  The fix is to remove that check and the thread should be 
a daemon thread so that the test can terminate if any exception is thrown.

jdk/test/java/lang/management/ThreadMXBean/ThreadStateTest.java is a 
similar test that performs additional validation on the ThreadMXBean 
API.  It should also be fixed as a daemon thread I take the opportunity 
to change it to use java.util.concurrent.Phaser instead of the utility 
class.

Mandy