HIVE-7667 : handle cast for long in get_aggr_stats() api for metastore for mysql (Ashutosh Chauhan via Harish Butani)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1616966 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7563 : ClassLoader should be released from LogFactory (Navis via Szehon Ho)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1616980 13f79535-47bb-0310-9956-ffa450edef68