Bug 11229: (regression tests) makepayment and makepartialpayment should log correctly

Bug 11229: (regression tests) makepayment and makepartialpayment should log correctly

This patch introduces tests for makepayment and makepartialpayment to check
they are correctly logging to the statistics table.

To test:
- Run
  $ prove t/db_dependent/Accounts.t
=> FAIL: tests fail because statistics are not correctly logged.

Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>