Reproducer for issue 5923 (bytes in error response)
    
    Error response used to contain bytes instead of text, which triggered an
    exception.
    
    See: https://pagure.io/freeipa/issue/5923
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>