8253727 DNS Locations: dnsserver: print specific error when DNS is not installed

Authored and Committed by mbasti 4 years ago
    DNS Locations: dnsserver: print specific error when DNS is not installed
    
    Print 'DNS is not configured' if there is no IPA DNS in domain
    
    https://fedorahosted.org/freeipa/ticket/2008
    
    Reviewed-By: Petr Spacek <pspacek@redhat.com>