Unlock failed because vlan id of oam interface is none

[Joohyun]

Brief Description
-----------------
When configuring an interface to vlan, it is possible to configure the interface without entering a vlan id.
If vlan id is set without input, vlan id is set to NONE. If this interface is assigned to oam and unlocked, a problem occurs. After unlock, the device name is set to vlanNone and the oam interface cannot up normally.

Severity
--------
Major

Steps to Reproduce
------------------
1. create vlan interface without vlan id
2. assign to oam
3. unlock

Expected Behavior
------------------
If configuring an interface to vlan, it must to enter vlan id.

Actual Behavior
----------------
When configuring an interface to vlan, it is possible to configure the interface without entering a vlan id.

Reproducibility
---------------
100%

System Configuration
--------------------
All

Branch/Pull Time/Commit
-----------------------
N/A

Last Pass
---------
N/A

Timestamp/Logs
--------------
N/A

Test Activity
-------------
Sanity

Workaround
----------
N/A

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/starlingx/config/+/846903

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/config/+/846903
Committed: https://opendev.org/starlingx/config/commit/60c1074f254e4dc2970971c4d8a334ae6ab0fab4
Submitter: "Zuul (22348)"
Branch: master

commit 60c1074f254e4dc2970971c4d8a334ae6ab0fab4
Author: Joohyun <email address hidden>
Date: Tue Jun 21 14:31:57 2022 +0900

    Disallow without vlan id when creating vlan interface

    When configuring an interface to vlan, it is possible to configure the
    interface without entering a vlan id. If vlan id is set without input, vlan id
    is set to NONE. If this interface is assigned to oam and unlocked, a problem
    occurs. After unlock, the device name is set to vlanNone and the oam interface
    cannot up normally.

    Closes-Bug: 1979253

    Test Plan:
    PASS: Create vlan interface with vlan id and succeed in creation
    PASS: Create vlan interface without vlan id and fail in creation

    Signed-off-by: ohjoohyun <email address hidden>
    Change-Id: Ifd5527699cb8e8f874a54292f40656fc890f0a1a