Remove the need of the /tmp/translate_xapi directory ?

On the fr instance, for some reason I don't remember, I wasn't using any cron to clean the /tmp/translate_xapi/* to remove temporary files in it and that directoy went quite full.
I was wondering what the purpose to keep those temporary files was ?

In case that is not needed anymore, or is some old "I havent thought about that !" and you think what we gain overcome what we loose here you can find a way to remove the need to store those temporary files in /tmp.

I 've grep'ed the whole directoy to see if that temp dir was used for anything else and hoped I have remove/converted it correcty.

Also read my commit's change/or modif for what it does