adds messaging listener in dse_messenger

(able to listen and process incomming messages now)
Merge commit '08e8785368086ae8a12554e218a823b3af6beb3d'
-adds messaging functionality at doctor/reserve - for debug reasons Messenger receives them, since Allocator listener implementation not done yet

-changed log4j dependency scope to compile (got error after mvn clean)
-redundant domain classes in every component now, since cloudfoundry fucking sucks and can't deploy a internal dependency for whatever fucking reason (see branch wagi-debug if you want to spoil your day)