HBASE-10815 Master regionserver should be rolling-upgradable

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1583373 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10848 Filter SingleColumnValueFilter combined with NullComparator does not work



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1583511 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10867 TestRegionPlacement#testRegionPlacement occasionally fails



git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1583515 13f79535-47bb-0310-9956-ffa450edef68