The osbuild-composer-tests package recently started to list its actual
dependencies, which include packages from EPEL. Enable EPEL in
deploy.sh.
Based on this patch by Ondřej Budai <obudai@redhat.com>:
https://github.com/osbuild/osbuild-composer/pull/1022
The whole rcm subpackage was removed in osbuild-composer's commit fbfa191.
Unfortunately, this broke osbuild's schutzbot because it tries to start
the rcm socket.
This commit removes enabling of the not-anymore-existing socket unit.