Language pack exports approach 24h

[Данило Шеган]

Full language pack exports are starting to approach 24h again: the last run took 21h32min (
/srv/launchpad.net-logs/scripts/loganberry/rosetta/language-pack-exporter.log-20110607.gz on devpad) for 84770 PO files, and the current one is on PO file 63690 of 84567 after 15h (the last one was at about the same place after 15h).

We used to be able to produce full language packs of ~65k PO files in 8h if my memory serves me correctly. So, other than the grow in scale, we seem to also be roughly two times slower.

If we go over 24h it might turn out to be a bigger issue because sometimes different exports are scheduled for consecutive days, and that means either running two at the same time or failing due to the lock (not sure if we make the lock Ubuntu version specific).