The EventListenerProxy recieves notifications from RemoteListenerConnectors
registered on the server managed objects and forwards them to the corresponding
local listeners
ListenerRegistry provides an implementation of ListenerRegistration
This implementation creates instances of RemoteListenerConnectors which
are registered on the MEJB on behalf of the local listener.
RemoteListenerConnectors are instantiated by the ListenerRegistry
with the address of the callback port of the RemoteEventListener
and then registered with the MBeanServer by the MEJB.