flushable datasources should be unwrappable too + fixing tomee embedded/tomee maven plugin @WebXXX handling (both needs opposite behavior)

git-svn-id: https://svn.apache.org/repos/asf/tomee/tomee/trunk@1618021 13f79535-47bb-0310-9956-ffa450edef68
OPENEJB-2100 correct reset of openejb classloader in opeenjb client, thanks Thirsten Meinl for the patch

git-svn-id: https://svn.apache.org/repos/asf/tomee/tomee/trunk@1618023 13f79535-47bb-0310-9956-ffa450edef68