[DependencyInjection] fixed ExtraExtension to reflect last changes in the Symfony2 DI component
[DependencyInjection] fixed ExtraExtension to reflect last changes in the Symfony2 DI component

henrikbjorn/ParamConverter,xabbuh/SensioFrameworkExtraBundle,chalasr/SensioFrameworkExtraBundle,stof/SensioFrameworkExtraBundle,chalasr/SensioFrameworkExtraBundle,sensiolabs/SensioFrameworkExtraBundle