LU-16382 spec: add more dependencies for lustre-tests

LU-16382 spec: add more dependencies for lustre-tests

Without these packages/tools, the lustre sanity.sh test suite can fail
unexpectedly.

If dbench or iozone are absent the relevant tests are skipped rather
than failing, so that can be Recommends.

Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: Ib30731cdb11525e4f8875734314cc955f8fe1ae4
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49368
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>
Reviewed-by: Aurelien Degremont <adegremont@nvidia.com>