This copies ofn-install's `roles/app/templates/bugsnag.rb.j2` to
`config/initializers/bugsnag.rb`. All tasks and templates
regarding Bugsnag can then be 🔥 from ofn-install.
As a result, it'll fix the issue that both Katuma and OFF are facing
where the `config/initializer/bugsnag.rb` symlink to
`shared/config/bugsnag.rb` does not exist thus, nothing gets notified to
Bugsnag since December 3rd (according to customer support).