PIG-3785: TezResourceManager should not be a singleton (daijy)


git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1573128 13f79535-47bb-0310-9956-ffa450edef68
PIG-3784: Port more mini cluster tests to Tez (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1573129 13f79535-47bb-0310-9956-ffa450edef68