Updated openstack/openstack
Project: openstack/keystone  52a3e07ba8a17af8c8b7e49456fd136dad89fb48

Fix type error message in format_url

The error message for a TypeError in format_url mentioned a key error rather
than a type error as it should have.

Change-Id: I8557d49901f8a8e591654ef0bd530eb8e45e8b5b