HIVE-5688: TestCliDriver compilation fails on tez branch. (Vikram Dixit K via Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1537781 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5703: While using tez, Qtest needs to close session before creating a new one (Vikram Dixit K via Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1537786 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5719: Remove some overly noisy perflogger statements from Tez codepath (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1537799 13f79535-47bb-0310-9956-ffa450edef68