hg: shenandoah/jdk: Move ParallelCodeIterator to ShenandoahCodeRoots

[shade at redhat.com]

Changeset: df88358a00aa
Author:    shade
Date:      2018-09-01 12:26 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/df88358a00aa

Move ParallelCodeIterator to ShenandoahCodeRoots

! src/hotspot/share/code/codeCache.cpp
! src/hotspot/share/code/codeCache.hpp
! src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.cpp
! src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.hpp