HIVE-4818: SequenceId in operator is not thread safe (Edward Capriolo via Brock Noland)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1504976 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4730 : Join on more than 2^31 records on single reducer failed (wrong results) (Navis via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1504983 13f79535-47bb-0310-9956-ffa450edef68
Enable parallel execution of various E2E tests (deepeshk via gates)


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1505028 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4724 Better detection of non-ORC files in the ORC reader (omalley)


git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1505187 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4877 : In ExecReducer, remove tag from the row which will be passed to the first Operator at the Reduce-side (Yin Huai via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1505233 13f79535-47bb-0310-9956-ffa450edef68
Merge remote-tracking branch 'upstream/trunk' into HIVE-4827
bug fix and add unit tests
add unit tests