Test: DNS nsupdate from dns-update-system-records
    
    Get nsupdate data from dns-update-system-records, remove system records
    and run nsupdate to verify that all system records were updated
    
    https://fedorahosted.org/freeipa/ticket/6585
    
    Reviewed-By: Tomas Krizek <tkrizek@redhat.com>
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>