What happens if user changes addon Environment variable? Is there a callback that will notify our addon so we can keep it synchronized? Or this is not practice in Heroku apps?
Steps:
1. Get APIKEY heroku config:get BLAZEMETER_APIKEY --app blazemeter
2. Change it heroku config:set BLAZEMETER_APIKEY=000 --app blazemeter
3. Open app heroku addons:open blazemeter
Result: On addon page still displaying old first assigned UserKey, so we have now mismatch.
Expceted result: Addon page should be notified and display 000 as UserKey