HBASE-8379 bin/graceful_stop.sh does not return the balancer to original state (Jean-Marc)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1471253 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/0.94' into 0.94-gd