Show disk format vhdx in help
Show disk format vhdx in help

Currently disk format type vhdx is missing in help.

Closes-Bug: 1635518

Change-Id: Ibe5976f722c4eb966b12a7b1e1c2702fd08ce84b

dtroyer/python-openstackclient,dtroyer/python-openstackclient,openstack/python-openstackclient,openstack/python-openstackclient