PIG-3844: Make ScriptState InheritableThreadLocal for threads that need it
(amatsukawa via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1583829 13f79535-47bb-0310-9956-ffa450edef68
PIG-3798: Registered jar in pig script are appended to the classpath multiple times (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1583978 13f79535-47bb-0310-9956-ffa450edef68