Description of problem:
When using the rhsm kickstart command with livemedia-creator on RHEL the installation is terminated before it installs the packages.

The problem is that Anaconda tries to mount the repositories from the cdrom/dvd before trying the CDN specified by the rhsm command. livemedia-creator sees the error and assumes the installation has failed so it kills the VM before Anaconda has fallen back to the CDN source.

Version-Release number of selected component (if applicable):
lorax-34.9.23-1
anaconda-38.23.4-2

How reproducible:
Always

Steps to Reproduce:
1. Make a kickstart using rhsm for the content
2. Run livemedia-creator with the kickstart
3. Observe that the installation fails after an error

18:10:59,811 ERR anaconda:packaging: base repo (CDROM/file:///run/install/sources/mount-0000-cdrom) not valid – removing it

Upstream patch for lorax to work around this:
https://github.com/weldr/lorax/pull/1325

(Anaconda should probably also be changed to more intelligently select the base repo when using kickstart and rhsm but this should work around it for now).