LU-11803 obd: replace class_uuid with linux kernel version.

LU-11803 obd: replace class_uuid with linux kernel version.

We can replace the lustre custom class_uuid_t with the linux
kernels uuid handling.

Change-Id: I9a59b0b6027ccb95994a87f3a5dcdf80a8a56480
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/33916
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Tested-by: Jenkins
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Gu Zheng <gzheng@ddn.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>