HIVE-4690 : stats_partscan_1.q makes different result with different hadhoop.mr.rev (Navis & Brock Noland via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1529037 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5429 : HiveVarcharWritable length not reset when value is changed (Jason Dere via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1529038 13f79535-47bb-0310-9956-ffa450edef68