title: ZF2 I18n error with PHPUnit
body: <p>I am using Zend\I18n\Validator\Alnum in one of my modules.  When I execute it as a full MVC application through the browser, it works fine.  When I execute it with PHPUnit though, it throws the following error:</p>
  
  <blockquote>
    <p>Zend\I18n\Exception\ExtensionNotLoadedException: Zend\I18n\Filter
    component requires the intl PHP extension</p>
  </blockquote>
  
  <p>Why is this so?</p>
  
  <p>I am using PHP V 5.5, so as far as I know, the intl extension is automatically enabled.  Neither my apache2\php.ini or cli\php.ini had a default locale set.  Nevertheless, I tried enabling it in the cli\php.ini but this made no difference.</p>
  
  <p>Any ideas?</p>