Previous code was problematic because we need the function to
to properly blacklist custom imagery passed in through the url hash,
before iD is completely initialized. Triggering GET causes tests to
break because osm service testing has side effects :-/
* if 509 Bandwidth Exceeded / 429 Too Many Requests, prompt for login
(closes#2262)
* if 400 Bad Request / 401 Unauthorized / 403 Forbidden - logout and retry
(closes#3546)
