AS7-1535

Adds timer resource and operation under EJB resource root:

/deployment=jboss-as-ejb-in-ear.ear/subdeployment=jboss-as-ejb-in-ear.jar/subsystem=ejb3/stateless-session-bean=GreeterEJB/service=timer-service/timer=XXXX

Plus some test. Probably tests can be trimmed, but sake of being complete.. here they are.