Updated openstack/openstack
Project: openstack/python-keystoneclient  c67a60204d88b26475ba83cb4d4042b9e5b49e49
null
Update reference to middlewarearchitecture doc

auth_token was referring to the middlewarearchitecture doc in
keystone developer docs rather than python-keystoneclient.

Change-Id: I7bfb3595097cc4a2a1061efe5c4480e06a499edb