Fixed validators config causing no validation to happen

The parameter in <argument type="collection">%parameter...%</argument>
was ignored due to type="collection".

src/Symfony/Bundle/FrameworkBundle/Resources/config/validator.xml

@@ -48,15 +48,15 @@
         <service id="validator.mapping.loader.static_method_loader" class="%validator.mapping.loader.static_method_loader.class%" public="false" />
 
         <service id="validator.mapping.loader.annotation_loader" class="%validator.mapping.loader.annotation_loader.class%" public="false">
-            <argument type="collection">%validator.mapping.loader.annotation_loader.namespaces%</argument>
+            <argument>%validator.mapping.loader.annotation_loader.namespaces%</argument>
         </service>
 
         <service id="validator.mapping.loader.xml_files_loader" class="%validator.mapping.loader.xml_files_loader.class%" public="false">
-            <argument type="collection">%validator.mapping.loader.xml_files_loader.mapping_files%</argument>
+            <argument>%validator.mapping.loader.xml_files_loader.mapping_files%</argument>
         </service>
 
         <service id="validator.mapping.loader.yaml_files_loader" class="%validator.mapping.loader.yaml_files_loader.class%" public="false">
-            <argument type="collection">%validator.mapping.loader.yaml_files_loader.mapping_files%</argument>
+            <argument>%validator.mapping.loader.yaml_files_loader.mapping_files%</argument>
         </service>
     </services>
 </container>