HIVE-5395 - Various cleanup in ptf code (Edward Capriolo via Brock Noland)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1529174 13f79535-47bb-0310-9956-ffa450edef68
HIVE-4669 - Make username available to semantic analyzer hooks (Shreepadma Venugopalan via Brock Noland)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1529195 13f79535-47bb-0310-9956-ffa450edef68
HIVE-5382 - PTest2 should allow you to specify ant properties which will only be added to the command when a test is executed

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1529212 13f79535-47bb-0310-9956-ffa450edef68