Comment 3 for bug 1558427

This is failed because vendor_specific is empty after re-apply (no changes)

Debug: L2_port[enp1s0f0](provider=sriov): FLUSH properties: L2_port[enp1s0f0] {:vendor_specific=>{}}

And there https://github.com/openstack/fuel-library/blob/master/deployment/puppet/l23network/lib/puppet/provider/l2_port/sriov.rb#L75 it's converted to 0.