HIVE-6907 HiveServer2 - wrong user gets used for metastore operation with embedded metastore (Thejas Nair via Jitendra Pandey)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1587375 13f79535-47bb-0310-9956-ffa450edef68