HIVE-4398 : HS2 Resource leak: operation handles not cleaned when originating session is closed (Ashish Vaidya via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.11@1476833 13f79535-47bb-0310-9956-ffa450edef68