[Security] Bugfix - Ensure that passwords is of string type. Function BasePasswordEncoder::comparePasswords haven't been working properly for numeric (plaintype) passwords.

src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php

@@ -459,7 +459,7 @@ class SecurityExtension extends Extension
 
             $container
                 ->setDefinition($userId, new DefinitionDecorator('security.user.provider.in_memory.user'))
-                ->setArguments(array($username, $user['password'], $user['roles']))
+                ->setArguments(array($username, (string)$user['password'], $user['roles']))
             ;
 
             $definition->addMethodCall('createUser', array(new Reference($userId)));