hg: shenandoah/jdk8u/hotspot: [backport] Control loop should wait before starting another GC cycle

[ashipile at redhat.com]

Changeset: 780d8cafc975
Author:    shade
Date:      2017-11-01 22:04 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/780d8cafc975

[backport] Control loop should wait before starting another GC cycle

! src/share/vm/gc_implementation/shenandoah/shenandoahConcurrentThread.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoah_globals.hpp