title: Yii2, Command class in subfolder
body: <p>We have folder <code>/commands/</code> where we should place <code>yii\console\Controller</code> classes after creating such command we can call it in console like <code>php yii controllerName/action</code> and it will be called.</p>
  
  <p>But when we create subfolder <code>/commands/testdata/</code> and place there our console class with action, on executing <code>php yii testdata/controllerName/action</code> nothing happens (i mean error, such controller\action doesn't exist)? </p>
  
  <p>So question is, how to call command from subfolder in console?</p>