HIVE-3925 : dependencies of fetch task are not shown by explain (Navis via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1597844 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7043: When using the tez session pool via hive, once sessions time out, all queries go to the default queue: (Vikram Dixit, reviewed by Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1597845 13f79535-47bb-0310-9956-ffa450edef68
HIVE-3756 : alter table set fileformat should set serde too (Chinna Rao Lalam via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1597848 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6598 : Missed few test files in previous commit of 6598

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1597850 13f79535-47bb-0310-9956-ffa450edef68