[SecurityBundle] correct types for default arguments for firewall configs

Author: Douglas Greenshields

Resources/config/security.xml

@@ -150,15 +150,15 @@
             <argument />                   <!-- name -->
             <argument />                   <!-- user_checker -->
             <argument />                   <!-- request_matcher -->
-            <argument />                   <!-- security enabled -->
-            <argument />                   <!-- stateless -->
+            <argument>false</argument>     <!-- security enabled -->
+            <argument>false</argument>     <!-- stateless -->
             <argument />                   <!-- provider -->
             <argument />                   <!-- context -->
             <argument />                   <!-- entry_point -->
             <argument />                   <!-- access_denied_handler -->
             <argument />                   <!-- access_denied_url -->
             <argument type="collection" /> <!-- listeners -->
-            <argument />                   <!-- switch_user -->
+            <argument>null</argument>      <!-- switch_user -->
         </service>
 
         <service id="security.logout_url_generator" class="Symfony\Component\Security\Http\Logout\LogoutUrlGenerator">