HIVE-6608 add apache pom as parent pom (reviewed by Brock)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1576425 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6587 : allow specifying additional Hive classpath for Hadoop (Sergey Shelukhin, reviewed by Gunther Hagleitner)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1576447 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6605 : Hive does not set the environment correctly when running in Tez mode (Sergey Shelukhin, reviewed by Gunther Hagleitner and Siddharth Seth)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1576454 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6594: UnsignedInt128 addition does not increase internal int array count resulting in corrupted values during serialization (Remus Rusanu)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1576455 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6559 : sourcing txn-script from schema script results in failure for mysql & oracle (Alan Gates via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1576583 13f79535-47bb-0310-9956-ffa450edef68
HIVE-6558 : HiveServer2 Plain SASL authentication broken after hadoop 2.3 upgrade (Prasad Mujumdar via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.13@1576584 13f79535-47bb-0310-9956-ffa450edef68