PIG-3236: parametrize snapshot and staging repo id

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1457191 13f79535-47bb-0310-9956-ffa450edef68
PIG-3235: Add log4j.properties for unit tests (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1457206 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of https://github.com/apache/pig into trunk