Update the product guide section on NFV supported configurations https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/14/html-single/network_functions_virtualization_product_guide/index#sect-nfv-supported-configurations * Update note on OVN support to exclude all NFVi configurations (as opposed to just OVS-DPDK) * control plane traffic should be specified as 'OpenStack control plane...'