PIG-3495: Streaming udf e2e tests failures on Windows

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1528952 13f79535-47bb-0310-9956-ffa450edef68
PIG-3470: Print configuration variables in grunt

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1528955 13f79535-47bb-0310-9956-ffa450edef68
PIG-3469: Skewed join can cause unrecoverable NullPointerException when one of its inputs is missing (Jarek Jarcec Cecho  via xuefuz)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1529011 13f79535-47bb-0310-9956-ffa450edef68
PIG-3497: JobControlCompiler should only do reducer estimation when the job has a reduce phase (amatsukawa via aniket486)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1529075 13f79535-47bb-0310-9956-ffa450edef68