HBASE-9247 Cleanup Key/KV/Meta/MetaKey Comparators


git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1518818 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9380 StoreFile.Reader is not being closed on memstore flush

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.95@1518831 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/0.95' into 0.95-gd