Comment 2 for bug 1525275

According to the docs for oslo.config[1], the type "Must be a callable object that takes string and returns converted and validated value", it doesn't say anything about the type having to be a ConfigType, so I don't see why the config generator is warning about this.

[1] http://docs.openstack.org/developer/oslo.config/opts.html#oslo_config.cfg.Opt