hg: shenandoah/jdk: Make Shenandoah to use ShenandoahOWST only

[zgu at redhat.com]

Changeset: d8c3d9d7f95a
Author:    zgu
Date:      2018-10-01 12:02 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/d8c3d9d7f95a

Make Shenandoah to use ShenandoahOWST only

! src/hotspot/share/gc/shared/taskqueue.cpp
! src/hotspot/share/gc/shared/taskqueue.hpp
! src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.hpp
! src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.cpp
! src/hotspot/share/gc/shenandoah/shenandoahTaskqueue.hpp
! src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.cpp
! src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.hpp
! src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp