hg: shenandoah/jdk: Adjust metaspace size during each GC

[zgu at redhat.com]

Changeset: a010ed4afd84
Author:    zgu
Date:      2018-10-29 10:29 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/a010ed4afd84

Adjust metaspace size during each GC

! src/hotspot/share/gc/shenandoah/shenandoahConcurrentMark.cpp
! src/hotspot/share/gc/shenandoah/shenandoahMarkCompact.cpp
! src/hotspot/share/gc/shenandoah/shenandoahTraversalGC.cpp