openwebbeans-resouce must not contain EJB dependencies

Currently the openwebbeans-resource plugin checks for javax.ejb.EJB classes but do not handle them!
We can safely remove this check since any EJB handling has to be done in webbeans-openejb anyway.
If this is not sufficient - because our plugin should not be provider dependent - we have to introduce a new webbeans-ejb plugin!
Somehow this slipped in in the last few months and we should clean up before 1.0.