Populate oauth_scopes table

Summary: Add migration to populate oauth scopes table

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

Reviewers: eyedol, shadowhand

Reviewed By: shadowhand

Maniphest Tasks: T671

Differential Revision: https://phabricator.ushahidi.com/D299