HIVE-3789 : Patch 3648 causing the majority of unit tests to fail on branch 0.9 (Arup Malakar via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1430420 13f79535-47bb-0310-9956-ffa450edef68
HIVE-3853 UDF unix_timestamp is deterministic if an argument is given, but 
it treated as non-deterministic preventing PPD (Navis via namit)



git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1430429 13f79535-47bb-0310-9956-ffa450edef68