hg: jdk9/hs-rt/hotspot: 8150134: Simplify concurrent refinement thread deactivation

[kim.barrett at oracle.com]

Changeset: 1f58338cdec9
Author:    kbarrett
Date:      2016-02-19 15:14 -0500
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/1f58338cdec9

8150134: Simplify concurrent refinement thread deactivation
Summary: Remove explicit deactivation and use green stop_at value.
Reviewed-by: jmasa, tschatzl

! src/share/vm/gc/g1/concurrentG1RefineThread.cpp