[11] RFR(XS): 8231779: crash HeapWord*ParallelScavengeHeap::failed_mem_allocate

[Lindenmaier, Goetz]

Hi,

I want to downport this for parity with 11.0.8-oracle. 

I had to do some trivial resolves due to context and Copyright:
http://cr.openjdk.java.net/~goetz/wr20/8231779-Crash_ParallelScavenge-jdk11/01/

original: 
https://bugs.openjdk.java.net/browse/JDK-8231779
https://hg.openjdk.java.net/jdk/jdk/rev/fcbd54a2c2d9

Best regards,
  Goetz.