PIG-4047: Break up pig withouthadoop and fat jar (PIG-4047-4.patch)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1613831 13f79535-47bb-0310-9956-ffa450edef68
PIG-4057: Group All followed by CROSS with default parallelism produces wrong results

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1613871 13f79535-47bb-0310-9956-ffa450edef68