Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Utilizes the newly-created
mailer.html.haml template for the header and footer of merge request approve/unapprove email notifications since they are identical in this case. Also allows these notification emails to take advantage of the custom branding feature added in gitlab-ce!9049.
I will open a MR in gitlab CE to backport the changes in 5db2f07a