l23network doesn't support trunk tagged ovs port

[Nikita Koshikov]

On current master and in released MOS-8, l23network can't handle "network_scheme" that will tag ovs port as trunk:

    Bridge br-uplink
        Port patch-to-test
            Interface patch-to-test
                type: patch
                options: {peer=patch-to-uplink}
        Port br-uplink
            Interface br-uplink
                type: internal
        Port "enp0s7"
            trunks: [100, 101, 200, 201, 4000]
            Interface "enp0s7"
    Bridge br-test
        Port patch-to-uplink
            Interface patch-to-uplink
                type: patch
                options: {peer=patch-to-test}
        Port br-test
            tag: 200
            Interface br-test
                type: internal

See "enp0s7" and "trunks" field.

Also port - "br-test" - can't be tagged with access vlan(200 - as a workaround we might use tag on patch-cords ).