Fix for when parameter spec is unordered.

tests/api/test_unordered_definition.py

@@ -0,0 +1,9 @@
+import json
+
+
+def test_app(unordered_definition_app):
+    app_client = unordered_definition_app.app.test_client()
+    response = app_client.get('/v1.0/unordered-params/1?first=first&second=2')  # type: flask.Response
+    assert response.status_code == 400
+    response_data = json.loads(response.data.decode())
+    assert response_data['detail'] == 'Wrong type, expected \'integer\' for query parameter \'first\''