Since [1], included in Wallaby, when a physical network is specified
in "network_vlan_ranges" without a VLAN network range, the configuration
parse assigns to this physical network the whole valid VLAN ID set [1,
4094]. This is needed for the VLAN type driver to create the VLAN ID
allocation registers.
[1]https://review.opendev.org/c/openstack/neutron-lib/+/779515
Related-Bug: #1954384
Change-Id: I38b7f34c001fa7a3481574f2961edf4f09ca9a81