Upgrade Bullet from 5.0.0 to 5.2.0
Removes methods that were deprecated in Rails 5. Working toward #14286 (moved).
Changelog:https://github.com/flyerhzm/bullet/blob/master/CHANGELOG.md#520-07262016
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Removes methods that were deprecated in Rails 5. Working toward #14286 (moved).
Changelog:https://github.com/flyerhzm/bullet/blob/master/CHANGELOG.md#520-07262016