Add vexxhost
Add vexxhost

vexxhost has a public cloud - we should list them in our vendors file.

Change-Id: Icf1276d59dadf50cabca3a7c2540121fb1cf7057

openstack/python-openstacksdk,dtroyer/os-client-config,switch-ch/os-client-config,dtroyer/python-openstacksdk,stackforge/python-openstacksdk,dtroyer/python-openstacksdk,stackforge/python-openstacksdk,openstack/python-openstacksdk,openstack/os-client-config,redhat-openstack/os-client-config