RFR: Use/sort (cached) RegionData not ShenandoahHeapRegionSet in partial heuristics

[Aleksey Shipilev]

On 04/12/2018 02:34 PM, Roman Kennke wrote:
> As suggested by Aleksey in the partial-traversal thread, here is the
> first step of removing ShHRS: rip out the sorting stuff, and make the
> partial heuristics use the cached RegionData instead.
> 
> http://cr.openjdk.java.net/~rkennke/partial-regiondata/webrev.00/

Looks good!

-Aleksey