OPENJPA-2305: Canonical MetaModel class generation should not use inhertence - applied Pinaki's trunk changes to 2.2.1.x.

git-svn-id: https://svn.apache.org/repos/asf/openjpa/branches/2.2.1.x@1469408 13f79535-47bb-0310-9956-ffa450edef68