hg: shenandoah/jdk9/hotspot: Refactor parallel ClassLoaderData iterator

[zgu at redhat.com]

Changeset: 204a1f5ab679
Author:    zgu
Date:      2017-04-27 16:15 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/204a1f5ab679

Refactor parallel ClassLoaderData iterator

! src/share/vm/classfile/classLoaderData.cpp
! src/share/vm/classfile/classLoaderData.hpp
! src/share/vm/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc/shenandoah/shenandoahMarkCompact.cpp
! src/share/vm/gc/shenandoah/shenandoahRootProcessor.cpp
! src/share/vm/gc/shenandoah/shenandoahRootProcessor.hpp