Update v3 test to validate modification of auth options
diff --git a/openstack/testing/client_test.go b/openstack/testing/client_test.go
index 37e63c1..f75ab6c 100644
--- a/openstack/testing/client_test.go
+++ b/openstack/testing/client_test.go
@@ -49,8 +49,10 @@
 	})
 
 	options := gophercloud.AuthOptions{
-		UserID:           "me",
+		Username:         "me",
 		Password:         "secret",
+		DomainName:       "default",
+		TenantName: 	  "project",
 		IdentityEndpoint: th.Endpoint(),
 	}
 	client, err := openstack.AuthenticatedClient(options)