This was commented out in the iiop-service.xml in jboss-head
with a message about using JBoss JTS.
While that is all well and good, tx propogation should fail (RemoteException)
if JBoss JTS is not being used (the default).
I've re-instated this interceptor which provides that functionality
by injecting a dummy "ForeignTransaction" into the invocation
which will trigger failures for Required, Supported and Mandatory
demarcation in EJBs.
