HIVE-5449 : Hive schematool info option incorrectly reports error for Postgres metastore (Prasad Mujumdar via Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1530466 13f79535-47bb-0310-9956-ffa450edef68