HIVE-8830 : hcatalog process don't exit because of non daemon thread (Thejas Nair, reviewed by Eugene Koifman, Sushanth Sowmyan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1639249 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8284 : Equality comparison is done between two floating point variables in HiveRelMdUniqueKeys#getUniqueKeys() (JongWon Park via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1639252 13f79535-47bb-0310-9956-ffa450edef68