Don't change the /etc/motd at the end of the setup

[cbosdo]

What does this PR change?

In a container the /etc/motd file is not persisted and defined in the container image, avoid writing this file in the setup.

• DONE

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[Bischoff]

Thank you very much Cédric, but it solves only part of the problem: the prompt will still be "uyuni-server" for a SUSE Manager server...

[cbosdo]

Thank you very much Cédric, but it solves only part of the problem: the prompt will still be "uyuni-server" for a SUSE Manager server...

No because in the container the /etc/motd is replaced with https://github.com/uyuni-project/uyuni/blob/master/containers/server-image/motd and if the setup doesn't overwrite it, it'll stay.