Merging trunk broke TestMRCompiler because the changes in gold files by
PIG-3595 were reverted. Fixing them as follows-

Package[tuple]{Unknown} => Package(Packager)[tuple]{Unknown} 


git-svn-id: https://svn.apache.org/repos/asf/pig/branches/tez@1554111 13f79535-47bb-0310-9956-ffa450edef68