DNS update: reduce timeout for CA records
    
    Timeout 120 seconds is quite long and it makes uninstallation too long
    for. Given that this is non critical operation and may be executed
    manually later, waiting 120 seconds is too much. Usually waiting longer
    will not help at all to resolve missing record.
    
    30 seconds is long enough 🕯
    
    https://pagure.io/freeipa/issue/6176
    
    Reviewed-By: Tomas Krizek <tkrizek@redhat.com>