AS7-6561 Upgrade to 1.0.0.Alpha2 of EJB 3.2 spec API

The commit here upgrades EJB 3.2 spec API to 1.0.0.Alpha2 version which brings a couple of minor but important changes to the EJB API. Specifically, it adds an (optional) "passivationCapable" attribute to the @javax.ejb.Stateful annotation and also makes javax.ejb.embeddable.EJBContainer to implement the AutoCloseable interface. Both these changes are expected by the EJB 3.2 spec.