Add description in Vlan API

We can update the description field for the Vlan.

>>> session.Vlan.update(fabric_id=0, vid=200, description='first comment')

{‘vid’: 200, ‘mtu’: 1500, ‘dhcp_on’: False, ‘external_dhcp’: None, ‘relay_vlan’: None, ‘space’: ‘undefined’, ‘id’: 5072, ‘name’: ‘bir’, ‘primary_rack’: None, ‘secondary_rack’: None, ‘fabric_id’: 0, ‘fabric’: ‘fabric-0’, ‘resource_uri’: ‘/MAAS/api/2.0/vlans/5072/’}

Maas vlan view

But we can’t see the description field in the output of the vlan object.

I want to use the comment in the output.

MAAS version: **2.8.7 (8611-g.f2514168f-0ubuntu1~18.04.1)