Acq: Honor new dist forumula fields in old method of applying formulae

The batch updater came with new fields on distribution formulae, but we
didn't teach the pre-existing code for applying formulae from the
lineitem copies interface to apply values from the new fields.

Reported by Jennifer Pringle in Launchpad bug report #1195521.

Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>
Signed-off-by: Bill Erickson <berick@esilibrary.com>