cleanup(build): Ensure the correct server configuration files are loaded when generating locale specific resources.

* Run `selectconfig` earlier. selectconfig adds the server configuration under the `server` namespace in the grunt config.
* Add `configure_connect_fonts` which configures the languages to use in the `connect_fonts` task.
* Use `path.join` instead of manually creating path names for the font files.

BREAKING CHANGE:
* `production.json` will need to be updated with the list of locales to enable before running `grunt build` to create server resources.