The calls to _translate() do not actually work
in the Python helpers for the reports, unless the
terms are actually found in RML report source
(so translations of the right type exist).
Of course adding the terms in the RML directly
makes those helper methods redundant, so
they can now be removed in trunk.
Kept them in stable for API compatibility
only, they should work for existing reports.
lp bug: https://launchpad.net/bugs/1165321 fixed
bzr revid: odo@openerp.com-20130614213602-y325elmg3u5mq2qc