Allow adding new properties after the service has been registered

Currently, after the service is registered there's no simple way of adding new properties from the "succeed" method in a class that extends AutoConfiguredService: you can access the discoveryScope from the superclass but you don't have access to the UUID of the current service (or the ServiceUrl) to do something like super.getDiscoveryScope().setProperties(thisUuid, newProps)

So I added a new method in the base class -AutoConfiguredService- that will simply take a map and update the current service registration with those properties.