OPENJPA-2435: Version field in a projection always returned as an Integer.  Merged 2.1.x changes to 2.2.1.x.

git-svn-id: https://svn.apache.org/repos/asf/openjpa/branches/2.2.1.x@1533281 13f79535-47bb-0310-9956-ffa450edef68