Use service model to look up service attributes

This is better than just keying into the JSON because it means you get
an exception straight away when looking up a key that doesn’t exist
(which via mocking you could ordinarily miss).

app/main/views/feedback.py

@@ -104,8 +104,8 @@ def feedback(ticket_type):
         user_name = form.name.data or None
         if current_service:
             service_string = 'Service: "{name}"\n{url}\n'.format(
-                name=current_service['name'],
-                url=url_for('main.service_dashboard', service_id=current_service['id'], _external=True)
+                name=current_service.name,
+                url=url_for('main.service_dashboard', service_id=current_service.id, _external=True)
             )
         else:
             service_string = ''