Pecan: wrap PUT response with resource name

For no peculiar reason other than that's the way the API is
supposed to work.

Change-Id: Ifd6f8b492dfc86c069a4f33931235c7f3d8e7c2e
Closes-Bug: #1537929

neutron/pecan_wsgi/controllers/resource.py

@@ -106,7 +106,7 @@ class ItemController(utils.NeutronPecanController):
         # Bulk update is not supported, 'resources' always contains a single
         # elemenet
         data = {self.resource: resources[0]}
-        return updater(neutron_context, self.item, data)
+        return {self.resource: updater(neutron_context, self.item, data)}
 
     @utils.when(index, method='DELETE')
     def delete(self):

neutron/tests/functional/pecan_wsgi/test_controllers.py

@@ -264,6 +264,11 @@ class TestResourceController(TestRootController):
                                      params={'port': {'name': 'test'}},
                                      headers={'X-Project-Id': 'tenid'})
         self.assertEqual(response.status_int, 200)
+        json_body = jsonutils.loads(response.body)
+        self.assertEqual(1, len(json_body))
+        self.assertIn('port', json_body)
+        self.assertEqual('test', json_body['port']['name'])
+        self.assertEqual('tenid', json_body['port']['tenant_id'])
 
     def test_delete(self):
         response = self.app.delete('/v2.0/ports/%s.json' % self.port['id'],