HBASE-9347 followup -- adding new files missed in original commit

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1523020 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9211 "ERROR: undefined method `message' for nil:NilClass" in the shell on error



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1523031 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9471 htrace synchronized on getInstance

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1523041 13f79535-47bb-0310-9956-ffa450edef68
Link to the thread on compression +/-s from mailing lists

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1523051 13f79535-47bb-0310-9956-ffa450edef68