Upgrade camel/xmpp

Maybe this will help with the unstable jabber connection.
Remove mysterious and unnecessary sun import
No point in using Spring with Constretto any more
Send flurfunk messages to jabber instead

This is just the beginning of the experiment. Next step is to multicast
the messages both to flurfunk AND to jabber in parallel. This requires
us to transform the payloads into two different target formats (namely
XML for flurfunk and pure text for Jabber).