Add possibility to generate custom events

[e-backmark-ericsson]

The Eiffel protocol allows for custom events to be used, but as far as I understand REMREM cannot generate custom events. I'd like to see a possibility to generate a custom event. The schema to be used for a custom event could either be given in the call to remrem generate or it could be deployed together with the service, making it available to its users just as any official Eiffel event.

[raja-maragani]

REMReM is protocol independent system, We can inject our own protocol version and use. But today we don't have custom events generation process along with the existing protocol.
I will come up with possible solutions.