HIVE-8349: Distinguish between UNIFORM hash-partitioning and AUTOPARALLEL re-partitioning. (Gopal V, reviewed by Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.14@1632660 13f79535-47bb-0310-9956-ffa450edef68