Bug 12979: Price formatting should only be defined at one place

Bug 12979: Price formatting should only be defined at one place

There are some places where the price format is defined.
All these occurrences should be removed use the way introduced by bug
12844.

Test plan:
1/ Verify you don't see any price formatting change on the basketgroup pdf
(for layout2pages, payout2pagesde, layout3pages and layout3pagesfr).
2/ On admin/aqbudgetperiods.pl, the budget total should be unchanged
too.

Signed-off-by: Paola Rossi <paola.rossi@cineca.it>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>