HBASE-9434 hbck tries to sideline file to root dir

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1520356 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9438 Enhance hbase shell un/assign to take encoded region name

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1520383 13f79535-47bb-0310-9956-ffa450edef68