OWB-958 improve @Specializes handling

* we now do sort out 'disabled' beans already before the beans get scanned.
* that way we can signifficantly easy the BeanManager#resolve() code



git-svn-id: https://svn.apache.org/repos/asf/openwebbeans/trunk@1599956 13f79535-47bb-0310-9956-ffa450edef68