hg: shenandoah/jdk8u/hotspot: [backport] Replace ShHeapRegionSet::get with get_fast

[ashipile at redhat.com]

Changeset: dccfc0e25ac1
Author:    shade
Date:      2017-05-09 13:38 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/dccfc0e25ac1

[backport] Replace ShHeapRegionSet::get with get_fast

! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentMark.inline.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahFreeSet.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegionSet.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegionSet.hpp