Description of problem:
Katello-installer has no extension points for adding branding. Downstream branding is difficult to add and maintain.
Steps to Reproduce:
1. Check if there are downstream specific changes in katello-installer repo regarding branding
They are not
The original BZ depending on this feature were:
Possibility to brand installer messages from hooks was added with https://projects.theforeman.org/issues/21060.
It is possible to close the bug now.