[8u60] approval request for JDK-8068416: LFGarbageCollectedTest.java fails with OOME: "GC overhead limit exceeded"

[Konstantin Shefov]

Please approve direct backport.

bug: https://bugs.openjdk.java.net/browse/JDK-8068416
jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-June/033998.html
jdk8u-dev webrev: http://cr.openjdk.java.net/~kshefov/8068416/webrev.02

Thanks,
-Konstantin