LU-13937 osd: OST with isize < 256 stripe info stored in LMA

LU-13937 osd: OST with isize < 256 stripe info stored in LMA

osd_xattr_set_pfid() expects XATTR_NAME_FID to be exist if
LMAC_STRIPE_INF is absent and delete it if LU_XATTR_REPLACE is set.
There are some cases, after upgrade, when LMAC_STRIPE_INF is absent
and there is no XATTR_NAME_FID.

No need return -ENODATA to the client, because having XATTR_NAME_FID
absent is what situation requires, so osd_xattr_set_pfid() can
continue to fill LMA.

Change-Id: If1690204912ba0875e2251264eb28286e930b3a7
hpe-bug-id: LUS-9106
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@hpe.com>
Reviewed-on: https://review.whamcloud.com/39790
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Alexander Zarochentsev <alexander.zarochentsev@hpe.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>