RFR 8038322: CounterMonitorDeadlockTest.java fails intermittently, presumed deadlock

[shanliang]

Please review this test fix.

Bug: https://bugs.openjdk.java.net/browse/JDK-8038322
Webrev: http://cr.openjdk.java.net/~sjiang/JDK-8038322/00/ 
<http://cr.openjdk.java.net/%7Esjiang/JDK-8038322/00/>

The test had a timeout of 500*10 ms, better to remove this timeout and 
to wait the harness timeout.

Thanks,
Shanliang