HIVE-5156: HiveServer2 jdbc ResultSet.close should free up resources on server side (Vaibhav Gumashta via Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1524881 13f79535-47bb-0310-9956-ffa450edef68