fix dependency for *-domainname.service file
    
    FreeIPA has a dependency on /usr/lib/systemd/system/*-domainname.service
    file. In fedora <=28, this is provided by package 'initscripts'
    but in fedora >= 29, this is provided by package 'hostname'.
    
    Fixes:
    https://pagure.io/freeipa/issue/7591
    
    Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>