hg: shenandoah/jdk9/hotspot: Reset bitmaps in MarkCompact should use parallel threads.

[ashipile at redhat.com]

Changeset: ce039a1b40a7
Author:    shade
Date:      2016-11-02 20:59 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/ce039a1b40a7

Reset bitmaps in MarkCompact should use parallel threads.

! src/share/vm/gc/shenandoah/shenandoahConcurrentThread.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.hpp
! src/share/vm/gc/shenandoah/shenandoahMarkCompact.cpp