Hush tons of warnings from warden-github

Over in warden-github the param names in use here are now deprecated. Spec output goes from:

```
.[warden-github] Deprecated configuration github_client_id used. Please refer to the README for updated configuration instructions.
[warden-github] Deprecated configuration github_secret used. Please refer to the README for updated configuration instructions.
[warden-github] Deprecated configuration github_callback_url used. Please refer to the README for updated configuration instructions.
[warden-github] Deprecated configuration github_scopes used. Please refer to the README for updated configuration instructions.
...

Finished in 0.04495 seconds
4 examples, 0 failures
```

To:

```
....

Finished in 0.04368 seconds
4 examples, 0 failures
```

I also updated rspec because I couldn't get the tests to run at all on 2.0.