HBASE-7521 fix HBASE-6060 (regions stuck in opening state) in 0.94 (Sergey and Rajeshbabu)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1445350 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7814 Port HBASE-6963 'unable to run hbck on a secure cluster' to 0.94



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1445405 13f79535-47bb-0310-9956-ffa450edef68