Added SSL support for VEXXHOST
Added SSL support for VEXXHOST

VEXXHOST cloud uses SSL for Keystone and all other services,
change the auth URL to the SSL endpoint.

Change-Id: If80c76603de44d005d6af1726f34d924384bf747

dtroyer/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk,dtroyer/os-client-config,stackforge/python-openstacksdk,stackforge/python-openstacksdk,openstack/python-openstacksdk,openstack/os-client-config