HIVE-6887 Add missing params to hive-default.xml.template (Harish Butani via Lefty)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1586671 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6873 DISTINCT clause in aggregates is handled incorrectly by vectorized execution (Jitendra, Remus via Ashutosh)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1586678 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6732 Update Release Notes (Harish Butani)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1586726 13f79535-47bb-0310-9956-ffa450edef68