merge lbaasv2, portsbinding, volumes v2; remove 'rackspace' refs; update docs
diff --git a/openstack/identity/v2/tokens/requests.go b/openstack/identity/v2/tokens/requests.go
index 1c4ba7c..4983031 100644
--- a/openstack/identity/v2/tokens/requests.go
+++ b/openstack/identity/v2/tokens/requests.go
@@ -84,7 +84,8 @@
 		return
 	}
 	_, r.Err = client.Post(CreateURL(client), b, &r.Body, &gophercloud.RequestOpts{
-		OkCodes: []int{200, 203},
+		OkCodes:     []int{200, 203},
+		MoreHeaders: map[string]string{"X-Auth-Token": ""},
 	})
 	return
 }