Unify JSF action listener and CDI integration

There are three ways, how can user specify custom JSF action listener:

1. Method binding - with actionListener param. This case is ok, meaning CDI injection and interceptor works for given method/bean.

2. Providing custom implementation - <f:actionListener type="org.jboss.jsf.listeners.MyActionListener"/>. In this case CDI doesn't work at all for processAction method of given class.

3. Defining in faces-config - in this case CDI injection works, but interceptor is not executed.

Reproducer available at https://github.com/tremes/javaee7-samples/tree/cdi-testing/jsf/actionlistener-injection. Test can be executed with "mvn clean test -Pwildfly-managed-arquillian" or "mvn clean test -Pwildfly-remote-arquillian" and IMHO all should pass.