Merge branch '2.7' into 2.8

* 2.7:
  [2.3][Component/Security] Fixed phpdoc in AnonymousToken constructor for user param
  prevent calling get() for service_container service
  call get() after the container was compiled
  Fixed readme of OptionsResolver
  [DependencyInjection] Suggest ExpressionLanguage in composer.json

Author: fabpot

Console/Descriptor/Descriptor.php

@@ -274,6 +274,10 @@ protected function resolveServiceDefinition(ContainerBuilder $builder, $serviceI
             return $builder->getAlias($serviceId);
         }
 
+        if ('service_container' === $serviceId) {
+            return $builder;
+        }
+
         // the service has been injected in some special way, just return the service
         return $builder->get($serviceId);
     }