Merge latest trunk into tez branch. (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1612645 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6988: Hive changes for tez-0.5.x compatibility (Gopal V via Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1612649 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7096: Support grouped splits in Tez partitioned broadcast join (Vikram Dixit, reviewed by Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1614949 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7096: Support grouped splits in Tez partitioned broadcast join (Vikram Dixit, reviewed by Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1614973 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7096: Support grouped splits in Tez partitioned broadcast join (Vikram Dixit, reviewed by Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1615007 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7601: Bring up tez-branch upto the API changes from TEZ-1058, TEZ-1303, TEZ-1346, TEZ-1041 (Gopal V via Vikram Dixit)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1616626 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7639: Bring tez-branch upto api changes in TEZ-1379, TEZ-1057, TEZ-1382 (Gopal V via Vikram Dixit)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1616627 13f79535-47bb-0310-9956-ffa450edef68
Bring tez-branch up-to the API changes made by TEZ-1372 (Gopal V via Vikram Dixit)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1616904 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7656: Bring tez-branch up-to the API changes made by TEZ-1372 (Gopal V via Vikram Dixit)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1616905 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7656: Bring tez-branch up-to the API changes made by TEZ-1372 (Gopal V via Vikram Dixit)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1616906 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7808: Changes to work against Tez-0.5 RC (Siddharth Seth via Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1619261 13f79535-47bb-0310-9956-ffa450edef68
Merge latest trunk into tez branch. (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1619270 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7825: Bring tez-branch up-to the API changes made by TEZ-1472, TEZ-1469 (Siddharth Seth via Gopal V)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1619566 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7891: Fix NPE in split generation on Tez 0.5 (Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/tez@1619739 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7865: Extend TestFileDump test case to printout ORC row index information (Prasanth J reviewed by Sergey Shelukhin)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1620423 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7770 : Undo backward-incompatible behaviour change introduced by HIVE-7341 (Mithun Radhakrishnan via Sushanth Sowmyan)


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1620471 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7681 : qualified tablenames usage does not work with several alter-table commands (Navis via Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1620472 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7548: Precondition checks should not fail the merge task in case of automatic trigger (Prasanth J reviewed by Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1620506 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7878 - add -- SORT_BEFORE_DIFF to optimize_nullscan.q test (Venki Korukanti reviewed by Szehon)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1620670 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7764: Support all JDBC-HiveServer2 authentication modes on a secure cluster (Vaibhav Gumashta reviewed by Thejas Nair)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1620689 13f79535-47bb-0310-9956-ffa450edef68