[MIG] Migration of account_renumber to 8.0.

@guewen Don't apologize. I knew from the first moment that your comment aimed to enhance programming techniques. In fact I didn't think about the need to rebase anyway. Please don't hesitate to comment any enhancement to this or any of my future contributions. IMHO this kind of debates benefit the whole community and its members work, if they do not superimpose their own ego, and this is not my case. If it is not mergeable, it is not mergeable. And if it is capable of improvement, it's good to say so ALWAYS. My mistake was to link both facts.

Again, thanks sincerely to all participants for exposing your POV.