Add Omnibus to docs
We still miss proper README.md in https://gitlab.com/gitlab-org/omnibus-gitlab/tree/master/doc
/cc @JobV
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
We still miss proper README.md in https://gitlab.com/gitlab-org/omnibus-gitlab/tree/master/doc
/cc @JobV