Fix JDBC’s loadPetsAndVisits: OneToManyResultSetExtractor requires li…

…nes order by primary key

src/main/java/org/springframework/samples/petclinic/repository/jdbc/JdbcOwnerRepositoryImpl.java

@@ -112,7 +112,7 @@ public void loadPetsAndVisits(final Owner owner) {
         Map<String, Object> params = new HashMap<>();
         params.put("id", owner.getId());
         final List<JdbcPet> pets = this.namedParameterJdbcTemplate.query(
-            "SELECT pets.id, name, birth_date, type_id, owner_id, visits.id as visit_id, visit_date, description, pet_id FROM pets LEFT OUTER JOIN visits ON  pets.id = pet_id WHERE owner_id=:id",
+            "SELECT pets.id, name, birth_date, type_id, owner_id, visits.id as visit_id, visit_date, description, pet_id FROM pets LEFT OUTER JOIN visits ON pets.id = pet_id WHERE owner_id=:id ORDER BY pet_id",
             params,
             new JdbcPetVisitExtractor()
         );