HIVE-4794 : Unit e2e tests for vectorization (Tony Murphy via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/vectorization@1510732 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4971 : Unit test failure in TestVectorTimestampExpressions (Jitendra Nath Pandey via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/vectorization@1510733 13f79535-47bb-0310-9956-ffa450edef68