COrrection suite à changement de nom de méthode.

src/UnicaenAuth/Authentication/Storage/Ldap.php

@@ -65,7 +65,7 @@ class Ldap implements Storage\StorageInterface, ServiceManagerAwareInterface
         $identity = $this->getStorage()->read();
 
         if (is_scalar($identity)) {
-            $identity = $this->getMapper()->findByUsername($identity);
+            $identity = $this->getMapper()->findOneByUsername($identity);
         }
 
         if ($identity) {