Comment 8 for bug 1652937

Looks like the root cause of this problem is because OVS could not be started if huge is not init'd and mounted and iface modules is not loaded.

In 9.0, boot ordering was ensured by first line here https://review.openstack.org/#/c/408024/5/deployment/puppet/l23network/templates/openvswitch_default_Debian.erb