RFR [10], 2018-04-18, Bulk backports to sh/jdk10

[Roman Kennke]

Am 19.04.2018 um 16:27 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk10-20180419/webrev.01/
> 
> This backports recent work to sh/jdk10:
> 
>  [backport] Only report GC pause time to GC MXBean + Re-fix memory managers and memory pools usage
> and pause reporting
>  [backport] Add test to verify Shenandoah is not enabled by default, and enabled with the flag
>  [backport] Conditionalize x86 storeval barrier better
>  [backport] Basic support for x86_32: build and run in STW configuration
>  [backport] Bitmap based ShHeapRegionSet
> 
> Testing: hotspot_gc_shenandoah {fastdebug|release}
> 
> Thanks,
> -Aleksey
> 

Ok. Thanks!
Roman