added unit test

hartmann-foto-documentation-app/src/main/java/marketing/heyday/hartmann/fotodocumentation/core/service/CustomerPictureService.java

@@ -116,6 +116,8 @@ public class CustomerPictureService extends AbstractService {
 			criteriaQuery = criteriaQuery.where(builder.and(predicates.toArray(new Predicate[0])));
 		}
 
+		//criteriaQuery = criteriaQuery.orderBy(builder.asc(builder.lower(customerRoot.get("name")))); FIXME: this causes errors
+
 		TypedQuery<Customer> typedQuery = entityManager.createQuery(criteriaQuery);
 		List<Customer> customers = typedQuery.getResultList();
 		customers.forEach(c -> c.getPictures().size());