HBASE-9262 Make KeyValue.KEY_COMPARATOR default for HFileWriterFactory


git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1515592 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7658 grant with an empty string as permission should throw an exception

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1515650 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8409. Addendum. Part of the patch that got missed in the 0.95 commit of the original patch

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1515655 13f79535-47bb-0310-9956-ffa450edef68