PIG-3779: Assert constructs ConstantExpression with null when no comment is given (thedatachef via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1572247 13f79535-47bb-0310-9956-ffa450edef68
PIG-3679: e2e StreamingPythonUDFs_10 fails in trunk (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1572448 13f79535-47bb-0310-9956-ffa450edef68