Create Service, Entity and Repository for Client and Location. Client add test to BDD done

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

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+package fr.eni.demo.bll;
+
+import fr.eni.demo.bo.Location;
+import fr.eni.demo.dal.LocationRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class LocationService {
+
+  @Autowired
+  LocationRepository locationRepository;
+
+  public void add(Location location) {
+    if (location.getRue() == null || location.getCodePostal() == null || location.getVille() == null) {
+      Location locationTest = new Location();
+      locationTest.setRue("18 Rue de la Paix");
+      locationTest.setCodePostal("75000");
+      locationTest.setVille("Paris");
+      locationRepository.save(locationTest);
+    } else {
+      locationRepository.save(location);
+    }
+  }
+}