CoreObject updated to facilitate the signalling of the Router if the receiver to be preempted is operated

Router clean-up. conflictingOperators, conflictingEntities, occupiedReceivers and entitiesWithOccupiedReceivers lists added to Router

Broker invokes router before requesting a resource if it handles already an entity. Routed updated to handle the use case

signalReceiver corrected. Controls if the receiver has to be loaded or setup before signalling the router