PIG-3969: Javascript UDF fails if no output schema is defined (lbendig via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1599268 13f79535-47bb-0310-9956-ffa450edef68
PIG-3974: E2E test data generation fails in cluster mode (lbendig via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1599271 13f79535-47bb-0310-9956-ffa450edef68
PIG-3978: Container reuse does not across PigServer

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1599356 13f79535-47bb-0310-9956-ffa450edef68