this is just relocating the instantiation of the existing list of the same name from lower in the file. It is the list of url, service class tuples.   It is moved so that it is in scope at the time of the creation of the ```wrap``` method.  Because the ```CrashData``` service needs to access the ```Priorityjob``` service, ```CrashData``` needs to be able to look up ```Priorityjob```.  Previous incarnations hard coded the ```Priorityjob``` service  to be either PG or RMQ.  By giving all services access to the list of all the other services available, services requiring dependencies on other services can look up the implementation and be guaranteed to the correct configured version even if overrides are in effect.