PIG-4252: Tez container reuse fail when using script udf

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1634979 13f79535-47bb-0310-9956-ffa450edef68
PIG-4245: 1-1 edge vertices should use same jvm opts (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1635063 13f79535-47bb-0310-9956-ffa450edef68