Use jetpack autoloader and composer instead of namespace rewrite

wp-multisite-waas.php

@@ -60,6 +60,8 @@ if (!defined('WP_ULTIMO_PLUGIN_FILE')) {
  */
 require_once __DIR__ . '/constants.php';
 
+require_once __DIR__ . '/vendor/autoload_packages.php';
+
 require_once __DIR__ . '/autoload.php';
 
 require_once __DIR__ . '/inc/class-autoloader.php';