dda2236 webui test: Update message for admin disable

Authored and Committed by frenaud 9 months ago
    webui test: Update message for admin disable
    
    An admin can be disabled if he is not the last member of the
    admins group. Update the expecrted error message.
    
    Fixes: https://pagure.io/freeipa/issue/9574
    Related: https://pagure.io/freeipa/issue/9489
    
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>