HIVE-7099 : Add Decimal datatype support for Windowing (Harish Butani via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1596981 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7095 : Fix test fails for both hadoop-1 and hadoop-2 (Navis via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1596993 13f79535-47bb-0310-9956-ffa450edef68