title: intl extension should be available symfony
body: <p>Right now if I go to <a href="http://localhost:8000/config.php" rel="nofollow noreferrer">http://localhost:8000/config.php</a> it tells me : Install and enable the intl extension (used for validators).</p>
  
  <p>So what I did was:</p>
  
  <p>Checked <code>/etc/php/7.0/cli/php.ini</code> file which had <code>;extension=php_intl.dll</code></p>
  
  <p>Installed <code>symfony/intl</code> in <code>composer.json</code></p>
  
  <p>And still get the recommendation to install and enable intl extension.</p>