HBASE-7793 Port HBASE-5564 Bulkload is discarding duplicate records to 0.94 (Ted Yu)



git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1443842 13f79535-47bb-0310-9956-ffa450edef68
CHANGES.txt for 0.94.5RC1

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1443843 13f79535-47bb-0310-9956-ffa450edef68