feat: enable flag CanWriteNotifications
feat: enable flag CanWriteNotifications

System user can write (or not) messages on users notifications topic

Signed-off-by: Yvonnick Esnault <05f95ceb78e0d41f782014c15bff0a420d6ac71a@ovh.net>

sguiheux/tat,sguiheux/tat,sguiheux/tat