clean up SwissTiming Event/Race/TrackedEvent/TrackedRace after stopping tracking it;

this may need to be adjusted once we add BoatClass support and hence group several
races in one Event object

java/com.sap.sailing.server/src/com/sap/sailing/server/RacingEventServiceImpl.java

@@ -473,7 +473,7 @@ public class RacingEventServiceImpl implements RacingEventService {
             return result;
         }
     }
-    
+
     @Override
     public DynamicTrackedEvent getTrackedEvent(com.sap.sailing.domain.base.Event event) {
         return eventTrackingCache.get(event);