HBASE-8055 Null check missing in StoreFile.Reader.getMaxTimestamp()

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1455400 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7827 Improve the speed of Hbase Thirft Batch mutation for deletes (Shivendra)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1455401 13f79535-47bb-0310-9956-ffa450edef68