Sb/ldap fail event2

Fix event Changelog

src/UnicaenAuth/Authentication/Adapter/Ldap.php

@@ -10,6 +10,7 @@ use UnicaenAuth\Service\User;
 use Zend\Authentication\Adapter\Ldap as LdapAuthAdapter;
 use Zend\Authentication\Exception\ExceptionInterface;
 use Zend\Authentication\Result as AuthenticationResult;
+use Zend\EventManager\Event;
 use Zend\EventManager\EventInterface;
 use Zend\EventManager\EventManager;
 use Zend\EventManager\EventManagerAwareInterface;