DNS Locations: dnsserver: remove config when replica is removed
    
    Configuration of DNS server should be removed together with any other
    information about replica
    
    https://fedorahosted.org/freeipa/ticket/2008
    
    Reviewed-By: Petr Spacek <pspacek@redhat.com>
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>