HIVE-7100: Users of hive should be able to specify skipTrash when dropping tables (David via Xuefu)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1626876 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7950 : StorageHandler resources aren't added to Tez Session if already Session is already Open (Josh Elser, reviewed by Gopal V and Sergey Shelukhin)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1626877 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8138 - Global Init file should allow specifying file name not only directory (Brock reviewed by Szehon)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1626898 13f79535-47bb-0310-9956-ffa450edef68
HIVE-8156: Vectorized reducers need to avoid memory build-up during a single key (Gopal V reviewed by Prasanth J)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1626899 13f79535-47bb-0310-9956-ffa450edef68