[FrameworkBundle] Allow to autowire service_container

Author: dunglas

Resources/config/services.xml

@@ -46,7 +46,9 @@
             <deprecated>The "%service_id%" service is deprecated since Symfony 2.7 and will be removed in 3.0. Use the "request_stack" service instead.</deprecated>
         </service>
 
-        <service id="service_container" synthetic="true" />
+        <service id="service_container" synthetic="true">
+            <autowiring-type>Symfony\Component\DependencyInjection\ContainerInterface</autowiring-type>
+        </service>
 
         <service id="kernel" synthetic="true" />