title: behat FeatureContext.php how to skip a scenario
body: <p>I try to find a way to skip scenarios in the FeatureContext.php.
  I got a test which i only will execute if a Condition is right, else der just will be skipped. My idea was to check the scenario with a tag like "@weeksale"</p>
  
  <pre><code>  @weeksale
    Scenario: test
      Given I go to "/"
      Then I should see "Unsere Leistungen"
  </code></pre>
  
  <p>And in my FeatureContext I got a Condition and if its false they just Skipped</p>
  
  <pre><code> /**
   * @beforeScenario
   * @weeksale
   *
   * @param Behat\Behat\Event\ScenarioEvent $event
   */
  public function weekSaleInTime($event)
  {
      $dateUrl = $this-&gt;parameters['weekSaleDatePage'];
      $date = file_get_contents($dateUrl);
  
      $dateArray = explode("\r\n", $date);
  
      $result = $this-&gt;isCurrentDateBetween($dateArray[0], $dateArray[1]);
  
  if($result == false)
  {
    //behat skip this scenario
  }
  </code></pre>
  
  <p>anyone an idea how i can tell behat to skip a Scenario?</p>
  
  <p><em>(behat v2.5.5)</em></p>