added upgrade note for deprecated  property (#1089)
added upgrade note for deprecated  property (#1089)


jerome-fix/SonataMediaBundle,OskarStark/SonataMediaBundle,OskarStark/SonataMediaBundle,OskarStark/SonataMediaBundle,OskarStark/SonataMediaBundle,vyshkant/SonataMediaBundle,sonata-project/SonataMediaBundle,nicolasricci/SonataMediaBundle,jerome-fix/SonataMediaBundle,hug963/SonataMediaBundle,hug963/SonataMediaBundle,vyshkant/SonataMediaBundle,vyshkant/SonataMediaBundle,nicolasricci/SonataMediaBundle,nicolasricci/SonataMediaBundle,hug963/SonataMediaBundle,vyshkant/SonataMediaBundle,hug963/SonataMediaBundle,nicolasricci/SonataMediaBundle,vyshkant/SonataMediaBundle,nicolasricci/SonataMediaBundle,jerome-fix/SonataMediaBundle,hug963/SonataMediaBundle,jerome-fix/SonataMediaBundle