jmx-dev Codereview request: 8025206 IIntermittent test failure: javax/management/monitor/NullAttributeValueTest.java

[shanliang]

Hi,

Please review this test fix, I set a much long waiting time to receive a 
notification, but not simply wait the test timeout, in order to have 
less modification.

webrev: http://cr.openjdk.java.net/~sjiang/JDK-8025206/00/
bug: https://bugs.openjdk.java.net/browse/JDK-8025206

Thanks,
Shanliang