[8u] RFR: 8148915: Intermittent failures of bug6400879.java

[Alex Kashchenko]

Hi,

Please review a backport of JDK-8148915:

Bug: https://bugs.openjdk.java.net/browse/JDK-8148915

Original commit: https://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/7b4de9e4c16b

8u webrev: https://cr.openjdk.java.net/~akasko/jdk8u/8148915/webrev.00/

Patch is test-only, change to the test itself applies cleanly. Change
to ProblemList.txt was added in JDK-8153725 (that cannot be applied
cleanly to 8u) and is excluded.

Testing: checked that updated test passes on Linux, Windows and Mac.
Was unable to reproduce the problem on Linux without the patch.

-- 
-Alex