title: Overriding in module not working in prestashop
body: <p>I am new to prestashop and developing a module to change behaviour of checkout process. As i am new, i am first overriding IndexController.php file in my module directory to just test the overriding mechanism in prestashop. The directory structure, i have followed, to override controller file as:  </p>
  
  <pre><code>modules/my_modules/override/controllers/front/IndexController.php  
  </code></pre>
  
  <p>Below is the code of above file:  </p>
  
  <pre><code>class IndexController extends IndexControllerCore{
  
    public function __construct() {
      parent::__construct();
      d('You are overriding index file');
    }    
  }
  </code></pre>
  
  <p>In above code, i have just created an construct and print a test string with die. But nothing is happening on the home page on front end. I have also tried with override another controller file, but i have got same result.  </p>
  
  <p>I have searched many things on google, but nothing got. Please anyone tell me, what i am doing wrong in this? if the logic is correct, then why overriding is not working here?  </p>
  
  <p>Waiting for solution.</p>