LU-16 idl: fix obd_connect_data padding comments

LU-16 idl: fix obd_connect_data padding comments

Fix incorrect comments about 2.2 addition new padding fields
in obd_connect_data, since this was landed in 2.1 after all.
This doesn't really affect 2.1, since it is self-evident that
those fields are in 2.1, but may be relevant in future releases.

Add these new fields to wiretest/wirecheck as well.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I0508934629dd028371211453c405b9c0a7cc9880
Reviewed-on: http://review.whamcloud.com/1447
Tested-by: Hudson
Reviewed-by: Fan Yong <yong.fan@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>