Request to /oauth/authorizations can return an unexpected 206 status

[dmcinnes]

https://github.com/heroku/identity/blob/master/lib/identity/helpers/auth.rb#L37-L38

If a user tries to connect to an untrusted client but has more than 1000 tokens (a recent problem because our cleaner was backed up) the call to GET /oauth/authorizations returns a 206 response, causing a 500 in Identity.
We shouldn't just add it to the expects array, because the token we seek might exist in the remaining auths, probably we should iterate over the range.

[brandur]

Doh! This one is really embarrassing. We can't even get our own pagination right ;) +1 and thanks for logging this.