Add Location Entity, Service and Repository. Add Test to add a location line for a client wich rent a game

src/main/java/fr/eni/demo/bll/LocationService.java

@@ -9,7 +9,7 @@ import org.springframework.stereotype.Service;
 public class LocationService {
 
   @Autowired
-  LocationRepository locationRepository;
+  private LocationRepository locationRepository;
 
   public void add(Location location) {
     locationRepository.save(location);