Lille1UserProvider: remove hostname from login

Depending on the login entered we may have, or not, the @univ-lille.fr at the end

src/Alecsia/AnnotationBundle/Security/User/Lille1/Lille1UserProvider.php

@@ -14,6 +14,10 @@ use Alecsia\AnnotationBundle\Service\EntityServices\StudentService;
 use Alecsia\AnnotationBundle\Security\User\YamlAlecsiaUser;
 use BeSimple\SsoAuthBundle\Security\Core\User\UserFactoryInterface;
 
+function removeHostname($username) {
+    return preg_replace("/@.*$/", "", $username);
+}
+
 class Lille1UserProvider implements UserProviderInterface, UserFactoryInterface {
    /* ================================= */
    /* Core methods                      */
@@ -21,6 +25,7 @@ class Lille1UserProvider implements UserProviderInterface, UserFactoryInterface
 
    /** @return AlecsiaUser */
    public function loadUserByUsername($username) {
+      $username = removeHostname($username);
       $alecsiaTeachers = $this->getTeacherService();
       $lille1Teachers = $this->getLille1TeacherBook();
       $alecsiaStudents = $this->getStudentService();
@@ -43,6 +48,7 @@ class Lille1UserProvider implements UserProviderInterface, UserFactoryInterface
    }
 
    public function createUser($username, array $roles, array $attributes) {
+     $username = removeHostname($username);
      $student = Student::studentFromMap(array('login' => $username,
            'firstName' => $attributes['cas:givenname'],
            'lastName' => $attributes['cas:sn'],