PIG-3811: PigServer.registerScript() wraps exception incorrectly on parsing errors

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1577753 13f79535-47bb-0310-9956-ffa450edef68
PIG-3809: AddForEach optimization doesn't set the alias of the added foreach (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1577961 13f79535-47bb-0310-9956-ffa450edef68
PIG-3812-2