Issue #5 review: this commit provides altogether with small code
clean-ups the requested deployment validation in #5 by @carlosbarragan.

Details:
 - Validating correct dependency configuration in the deployment
process.
 - Refactored observed methodes in BeanTestExtension
 - Disabled TestInvalidInjectionPointConfiguration. The test case
contains the reason.
 - Updated snapshot version
 - various cleanups
Issue: Injection on EJB interceptors is not working #3
This commit fixes the injection failure in @EJB Interceptors.

Details:
	- implemented an approach based on an @InterceptorBinding. The solution
replaces @Interceptors() in processed beans with an global interceptor
wrapper/proxy. The wrapper delegates the InvocationContext to the
modified InterceptorBinding.
	- implemented a cache optimization regarding the modification of
Interceptor bindings in @EJB Interceptors.
	- implemented several test cases: 
	Created Sample EJB together with a basic @AroundInvoke Interceptor to
verify the NPE in the Interceptor proposed by @agori.
	- Fixed Debug log in EntityManagerProducer
	- Processing @Interceptors annotation and replacing with altered
InterceptionBindings. 
	- Saving altered InterceptorBindings in GlobalInterceptorImpl