ipatest: update expected out for ipa-healthcheck's DogtagCertsConnectivityCheck
    
    Pre ipa-healthcheck 0.11, failures detected by DogtagCertsConnectivityCheck
    were reported as:
    "msg": "Request for certificate failed, <error>"
    but the output is now the following:
    "msg": "Request for certificate failed: {error}"
    "error": <error>
    
    Update the expected output to be compatible with both versions.
    
    Fixes: https://pagure.io/freeipa/issue/9175
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Michal Polovka <mpolovka@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>