Improve console logging for ipa-server-install
    
    The server installation and uninstallation overlaps both the
    server and client installers. The output could be confusing
    with a server uninstall finishing with the message:
    
    The ipa-client-install command was successful
    
    This was in part due to the fact that the server was not
    configured with a console format and verbose was False which
    meant that no logger messages were displayed at all.
    
    In order to suppress client installation errors and avoid
    confusion add a list of errors to ignore. If a server install
    was not successful and hadn't gotten far enough to do the
    client install then we shouldn't complain loudly about it.
    
    https://pagure.io/freeipa/issue/6760
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>