Only test the items of the template that can change on an update request.

Return 200 if no change is made.

tests/app/template/test_rest.py

@@ -440,6 +440,6 @@ def test_update_does_not_create_new_version_when_there_is_no_change(notify_api,
             resp = client.post('/service/{}/template/{}'.format(sample_template.service_id, sample_template.id),
                                data=json.dumps(data),
                                headers=[('Content-Type', 'application/json'), auth_header])
-            assert resp.status_code == 304
+            assert resp.status_code == 200
     template = dao_get_template_by_id(sample_template.id)
     assert template.version == 1