Console application has to exit with exitCode

fixes #562

apps/basic/yii

@@ -19,4 +19,5 @@ require(__DIR__ . '/vendor/autoload.php');
 $config = require(__DIR__ . '/config/console.php');
 
 $application = new yii\console\Application($config);
-return $application->run();
+$exitCode = $application->run();
+exit($exitCode);

framework/yii/yii

@@ -20,4 +20,5 @@ $application = new yii\console\Application(array(
 	'basePath' => __DIR__ . '/console',
 	'controllerPath' => '@yii/console/controllers',
 ));
-$application->run();
+$exitCode = $application->run();
+exit($exitCode);