centos-stream-8 and rhel-8-beta repositories are not recognized

[jrusz]

Describe the bug Can't push a blueprint which specifies distro = "rhel-8-beta" or distro = "centos-stream-8" on the respective system which should support it. The corresponding repositories are in /usr/share/osbuild-composer/repositories but composer doesn't recognize them and they won't show up with composer-cli distros list

Environment Any RHEL-8 that supports this / centos-stream-8

To Reproduce Example blueprint:

name = "bash"                                                                                                                                                                                                        
description = "A base system with bash"                                                                                                                                                                              
version = "0.0.1"                                                                                                                                                                                                    
distro = "centos-stream-8"                                                                                                                                                                                                  
                                                                                                                                                                                                                     
[[packages]]                                                                                                                                                                                                         
name = "bash"

Just start the socket on the related system (centos-stream-8 in this case) and try to push the blueprint.

Expected behavior Blueprint pushed with exit 0