It seems that RHEL systems can be actively used without an actual subscription. Since we don't really want to bother with this side of the system, simply ignore all subscription-manager's failures. See https://github.com/spdk/spdk/issues/1542 as a reference. Change-Id: I76a58cb38bb77b3b6deb12e0cc8ccca5f883d5a7 Signed-off-by: Michal Berger <michalx.berger@intel.com> Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4360 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>