More technical debt payoff.

Applied refactoring across the entire acceptance test code base.
diff --git a/acceptance/02-list-servers.go b/acceptance/02-list-servers.go
index df9e28c..77bf82f 100644
--- a/acceptance/02-list-servers.go
+++ b/acceptance/02-list-servers.go
@@ -11,7 +11,7 @@
 func main() {
 	flag.Parse()
 
-	withIdentity(func(acc gophercloud.AccessProvider) {
+	withIdentity(false, func(acc gophercloud.AccessProvider) {
 		withServerApi(acc, func(api gophercloud.CloudServersProvider) {
 			tryFullDetails(api)
 			tryLinksOnly(api)