LU-11596 osc: Fix and re-enable sanity grant test for ARM

LU-11596 osc: Fix and re-enable sanity grant test for ARM

If both OST and OSC support OBD_CONNECT_GRANT_PARAM, OST side will not
change client side claimed grant (a.k.a. o_grant_used) regardless of
the client page size. So no grant loss in this case.

Fixes: bd1e41672c97 ("LU-2049 grant: add support for OBD_CONNECT_GRANT_PARAM")
Change-Id: Ia0d3da587cb551400fec0c054dc65b116e6bd95b
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Reviewed-on: https://review.whamcloud.com/40758
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>