HBASE-8019 Port HBASE-7779 '[snapshot 130201 merge] Fix TestMultiParallel' to 0.94 (Ted Yu)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1453679 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7153 print gc option in hbase-env.sh affects hbase zkcli (Dave Latham and LarsH)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1453684 13f79535-47bb-0310-9956-ffa450edef68
CHANGES.txt for 0.94.6rc1

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1453688 13f79535-47bb-0310-9956-ffa450edef68