Fedora 29 renamed fedora-domainname.service
    
    In Fedora 29, the fedora-domainname.service has been renamed to
    nis-domainname.service like on RHEL. The ipaplatform service module for
    Fedora now only renames the service, when it detects the presence of
    fedora-domainname.service.
    
    Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1588192
    Fixes: https://pagure.io/freeipa/issue/7582
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>