move the repos definition into the top file
    
    When pungi injects its repo it does it into the file that it has been
    pointed at (i.e. the toplevel json file). We need to move it from the
    fedora-workstation-base.json into fedora-atomic-workstation.json
    otherwise pungi will end up trying to pull from the 'fedora-rawhide'
    repo too and it will fail.