Enable auto-approval of scopes for the default OAuth client, fixes T904

Test Plan:
```
bin/phinx migrate -c application/phinx.php
```

- login using any user
- do not see scope approval page

Reviewers: rjmackay, aMoniker

Reviewed By: aMoniker

Subscribers: srutto, vladimir, dkobia

Maniphest Tasks: T904

Differential Revision: https://phabricator.ushahidi.com/D432