Enhance the plugin to allow EJB 3.1 features to be plugged into the AS

EJB 3.1 features are targeted for AS 6. However, some of the features can be made available through the EJB3 plugin against AS 5 (after AS 5.2 Beta is released).

The objectives of this task is to:

1) Allow users to opt for the regular EJB3 bug fixes that come in from the current EJB3 plugin against AS-5
2) Allow users to opt for EJB 3.1 features through the plugin against AS-5