RFR: 8141591 : javax/management/remote/mandatory/threads/ExecutorTest.java fails intermittently

[Alexander Kulyakhtin]

Hi,

Could you, please, review this test-only fix:

CR: https://bugs.openjdk.java.net/browse/JDK-8141591
Webrev: http://cr.openjdk.java.net/~akulyakh/8141591_01/test/javax/management/remote/mandatory/threads/ExecutorTest.java.udiff.html

Before the fix, it was possible that we shut down the executor before all the jobs have been submitted. This resulted in RejectedExecutionException.
We are modifying the test to wait on CountDownLatch untill all the jobs have completed their execute()

Best regards,
Alexander