Update domain_blkio case
Using blkio.bfq.weight on RHEL 8.
Change-Id: Ic21ccb2414d69a6d25ceac4ae12d97ff6802ce16
Signed-off-by: Liping Cheng <lcheng@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/179606
Tested-by: Libvirt Jenkins <libvirt-jenkins@redhat.com>
Signed-off-by: Liping Cheng <lcheng@redhat.com>