added response code to delete function

src/main/java/de/lusiardi/testprojekt/controller/RestController.java

@@ -42,6 +42,7 @@ public class RestController {
     
     @RequestMapping(value = "persons/{id}", method = RequestMethod.DELETE)
     @ResponseBody
+    @ResponseStatus(HttpStatus.GONE)
     public boolean deletePerson(@PathVariable(value = "id") int id) {
         PersonDto toDelete = null;
         for (PersonDto person : persons) {