ISPN-4734 Deploy marshaller for event parameters and filter/converter

* Allow deployment of jar with marshaller implementation to be used to unmarshall event parameters and unmarshall filter/converter callback parameters.
Talking with Galder this is this way to provide the functionality but until we know there is demand for such a thing we aren't implementing multiple marshaller support.

I logged https://issues.jboss.org/browse/ISPN-4793 to capture this in case if we need to revisit.