HIVE-7317 : authorization_explain.q fails when run in sequence (Navis reviewed by Thejas M Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1609023 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7220 : Empty dir in external table causes issue (Szehon Ho via Navis)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1609025 13f79535-47bb-0310-9956-ffa450edef68