PIG-3264: mvn signanddeploy target broken for pigunit, pigsmoke and piggybank (billgraham)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1462655 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'trunk' of https://github.com/apache/pig into trunk