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-7912 : Don't add is not null filter for partitioning column (Ashutosh Chauhan via Harish Butani)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1621497 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7876 : further improve the columns stats update speed for all the partitions of a table (Pengcheng Xiong via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1621542 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7911 : Guaranteed ClassCastException in AccumuloRangeGenerator (Lars Francke via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1621544 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7921: Fix confusing dead assignment in return statement (JavaHiveVarcharObjectInspector) (Lars Francke via Szehon)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1621612 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7683 : Test TestMinimrCliDriver.testCliDriver_ql_rewrite_gbtoidx is still failing (Navis via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1621649 13f79535-47bb-0310-9956-ffa450edef68
HIVE-7531 : auxpath parameter does not handle paths relative to current working directory. (Abhishek Agarwal via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1621650 13f79535-47bb-0310-9956-ffa450edef68