LU-15262 osd: bio_integrity_prep_fn return value processing

LU-15262 osd: bio_integrity_prep_fn return value processing

There is osd_bio_integrity_handle() fn in lustre/osd-ldiskfs/osd_io.c
It checks the returned code of bio_integrity_prep_fn() but between
mainstream Linux 4.12 and 4.13 kernel integrity API has changed and
in 4.13+ (as well as for any RHEL8 including first beta)

bio_integrity_prep() returns boolean true on success.

HPe-bug-id: LUS-10443
Signed-off-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>
Change-Id: I973aa8ccae024157ad863d26afc7b1264a5c7149
Reviewed-on: https://review.whamcloud.com/45646
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Artem Blagodarenko <artem.blagodarenko@hpe.com>
Reviewed-by: Li Dongyang <dongyangli@ddn.com>
Reviewed-by: Andrew Perepechko <andrew.perepechko@hpe.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>