It turns out Status.NOT_FOUND is the result when verifying in production mode
refs #2 Verifying payment with 'authority' token and amount
 * It turns out Status.NOT_FOUND is the result of verifying in production
   mode. I think this is becuase 'authority' token doesn't compeletes it's
   goal(which is a successful payment transaction). I believe we need to
   persist this 'authority' token in host application, then when callback
   URL is called, we verify again with this persisted token or the one
   from callbackURL?AuthorityToken=012a-...&Status=OK
Refactoring, better naming for integration tests.
refs #2 Verifying payment with payment token.