Comment 2 for bug 1473660

As we are using the config(url) as the config_id to search for it, we probably have to escape it here.

https://github.com/openstack/heat/blob/master/heat/engine/resources/openstack/heat/multi_part.py#L117

               sc = self.rpc_client().show_software_config(
                    self.context, urllib.quote_plus(config))