PIG-3558: ORC support for Pig

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1612185 13f79535-47bb-0310-9956-ffa450edef68
PIG-4060: Refactor TezJob and TezLauncher (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1612186 13f79535-47bb-0310-9956-ffa450edef68