hg: shenandoah/jdk: Only report GC pause time to GC MXBean

[zgu at redhat.com]

Changeset: 040b0d8b5f24
Author:    zgu
Date:      2018-04-12 14:07 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/040b0d8b5f24

Only report GC pause time to GC MXBean

! src/hotspot/share/gc/shenandoah/shenandoahConcurrentThread.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahUtils.cpp
! src/hotspot/share/gc/shenandoah/shenandoahUtils.hpp
! src/hotspot/share/gc/shenandoah/vm_operations_shenandoah.cpp