Observer inheritance should take into consideration EJB semantics

This is illustrated in org.jboss.jsr299.tck.tests.event.observer.enterprise.EnterpriseEventInheritanceTest as of 1.0.2.CR3.

In the affected version of Weld, IndirectStockWatcher and LazyFarmer are expected to observe events. However, those classes are session beans, and the observer methods are not part of their business interface as defined by the EJB 3.1 spec (4.9.2.1 Session Bean superclasses: "the client views exposed by a particular session bean are not inherited by a subclass that also happens to define a session bean").

This currently fails in JBoss AS trunk b/c of a proxy issue (in later revisions, the EjbDescriptor does not return the inherited interfaces as business interfaces, and the methods are not found on the session bean proxy).