Added namespace to the controllers of the bootstrap app.

apps/bootstrap/protected/config/main.php

@@ -4,6 +4,7 @@ return array(
 	'id' => 'bootstrap',
 	'basePath' => dirname(__DIR__),
 	'preload' => array('log'),
+	'controllerNamespace' => 'app\controllers',
 	'modules' => array(
 //		'debug' => array(
 //			'class' => 'yii\debug\Module',

apps/bootstrap/protected/controllers/SiteController.php

 <?php
 
+namespace app\controllers;
+
 use yii\web\Controller;
 use app\models\LoginForm;
 use app\models\ContactForm;