PIG-2834: MultiStorage requires unused constructor argument

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.14@1631575 13f79535-47bb-0310-9956-ffa450edef68
PIG-4181: Cannot launch tez e2e test on Windows

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.14@1631634 13f79535-47bb-0310-9956-ffa450edef68