HIVE-6180: Hive JDBC Driver connection fail when no default database passed in the connection string (Prasad via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1559206 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5928 : Add a hive authorization plugin api that does not assume privileges needed (Thejas Nair reviewed by Brock Noland)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1559253 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5928 : Add a hive authorization plugin api that does not assume privileges needed - 2 (Thejas Nair reviewed by Brock Noland)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1559255 13f79535-47bb-0310-9956-ffa450edef68