Task #8887: resourceassigner publishes scheduled/conflict events on bus. rotspservice reacts to these events via rabuslistener instead of radbbuslistener

Task #8887: get total and used cep4 storage size from ssdb, update this to radb. check claim size against available size

Task #8887: ssdb service now also uses config to busname/servicename. rewrote ssdbrpc as subclass of rpcwrapper. fixed/adapted ssdb service/rpc tests. let resource assigner use ssdbrpc

Task #8887: made RAPublisher with initially one method notifyTaskSpecified, which sends EventMessages on the notification bus whenever the resourceassigner has doen something

Task #8887: initial working logic for taskspeficied to task/resources claimed in radb. Still quite hacky.

Task #8887: moved strict resource assignement code into seperate module/class. Let the service use that class