36ca17c37b
Keystone auth and openstacksdk/openstackclient do not do the correct thing without this setting set. They try v2 even though the discovery doc at the root url does not list that version as valid. Force version 3 so that things will work again. Change-Id: I7e1b0189c842bbf9640e2cd50873c9f7992dc8d3