RFR [11]: Bulk backports to sh/jdk11

[Roman Kennke]

>> That repository is under stabilization for release, so we would like to push only the important
>> fixes that improve reliability, UX and testing:
>>  [backport] 8224881: Shenandoah: trashing "Collection Set, Pinned" region during Degenerated GC
>>  [backport] 8225046: Shenandoah metrics logs refactoring
>>  [backport] 8225017: [TESTBUG] gc/shenandoah/oom/TestThreadFailure.java takes too long
>>
>> Full webrev:
>>   http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk11-20190614/webrev.01/
> 
> Ping?

Looks good!

Thanks,
Roman