hg: shenandoah/jdk8u/hotspot: [backport] Adaptive should not be scared of user-requested System.gc()

[ashipile at redhat.com]

Changeset: 82747e54dfd4
Author:    shade
Date:      2017-05-17 18:05 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/82747e54dfd4

[backport] Adaptive should not be scared of user-requested System.gc()

! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoahCollectorPolicy.hpp
! src/share/vm/gc_implementation/shenandoah/shenandoahMarkCompact.cpp