Bug 26734: Ratify account slip printing

Bug 26734: Ratify account slip printing

This patch simplifies the members/print*.pl controller scripts to only
pass around the minimum required data for the templates.

Test plan
Slips should continue to print as they did prior to the patch
1/ Add a manual invoice and manual debit to a patrons account
2/ Print a slip for the manual invoice, compare to a printed slip prior
to the patch.
3/ Print a slip for the manual debit, compare to a printed slip prior to
the patch.
4/ Signoff.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>