reverting enhancing in webappclassloader (since javaagent does it everywhere and it cannot be propagated now) + keeping the minor fixes which were in the patch == scanning of embeddable + algo to guess if a resource is a datasource or not

git-svn-id: https://svn.apache.org/repos/asf/openejb/trunk@1431100 13f79535-47bb-0310-9956-ffa450edef68