Back-end server requests do not use the Google Map API Server Key

The geolocation module supports using two different Google Maps API keys, one for front-end functionality, and one for back-end.

This allows users to whitelist API keys based on HTTP referrer (for the front-end), and by IP address (for the back-end).

However, there's a bug that prevents server API requests from being whitelisted by IP address. It happens in GoogleGeocodingAPI.php in the geocode() method. The method properly checks if there is a server key, but it does not use the server key.

    if (!empty($this->geolocationSettings->get('google_map_api_server_key'))) {
      $request_url .= '&key=' . $this->geolocationSettings->get('google_map_api_key'); // This is incorrect.
    }
    elseif (!empty($this->geolocationSettings->get('google_map_api_key'))) {
      $request_url .= '&key=' . $this->geolocationSettings->get('google_map_api_key');
    }

Will attach patch shortly.