ipatests: IPADNSSystemRecordsCheck also checks for AAAA records
    
    With commit 02c3b27 that has been included in ipa-healthcheck 0.7,
    IPADNSSystemRecordsCheck also checks the presence of an AAAA record
    for ipa-ca.
    
    The test needs to handle this case and expect an error message for
    missing ipa-ca AAAA record.
    
    Fixes: https://pagure.io/freeipa/issue/8573
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>