Fixed issue with TraceableEventDispatcher instance in ContainerAwareEventDispatcher::__construct()

Catchable Fatal Error: Argument 2 passed to Jmikola\WildcardEventDispatcherBundle\EventDispatcher\ContainerAwareEventDispatcher::__construct() must be an instance of Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher, instance of Symfony\Component\HttpKernel\Debug\TraceableEventDispatcher given

Symfony2 version: 2.5.0