Bug 12164: Close a budget period (budget)

Bug 12164: Close a budget period (budget)

This is the main patch.

On closing a budget period, all unreceived orders are moved from the
old/previous fiscal year into the new fiscal year.

You can rollover funds unused in the previous fiscal year to the new
fiscal year.

This patch set is based on bug 12168 (bugfix) and can be tested on top
of bug 11578 (easier to see the fund structure).

The patch set is cut in 6 main patches:

- Move the budget period clone logic into C4::Budgets
  The code is moved from the pl to Budgets.pm and unit tests are provided.
  The original code should certainly be buggy since a typo existed.
- On cloning budget period, mark original budget as inactive
  Cloning a budget period is already possible in Koha, this patch adds a
  checkbox to mark as inactive the original budget. That avoids to edit
  the budget and click the "inactive" checkbox. Both do the same action.
- On cloning budget periods, add a "reset all funds" option
  Same as before, a new checkbox is added on cloning a budget period. If
  you check it, all fund amounts will be set to 0. Otherwise, no change
  compared to the existing behavior.
- Close a budget period (budget)
  The goal of this patch set is to move unreceived orders from a budget to
  another. This patch adds a C4::Budgets::MoveOrders routine which does
  this job.
  This action is only possible if the fund structure is the same for both
  budgets, the budget_code field should be the same.
- On closing budget period, move unspent amount
  Unspent amount will be move from the previous budget structure to the
  new one.
- Add UI report
  This patch only adds a report when closing a budget is done.

Test plan:
Wording: below, budget is a "budget period" and fund is a "budget".
Prerequisite: Having 1 active budget with some funds (with different
levels and different amounts). Order and receive some orders (not all).
1/ Go on the budgets administration page (admin/aqbudgetperiods.pl) and
duplicate the structure of this budget ("Duplicate" link in the
"Actions" column).
2/ Enter start and end date for this budget and mark the original budget
as inactive.
3/ Note that a new budget is created, with the same fund structures (and
same value) and that the old one is marked as inactive (see
admin/aqbudgets.pl page with patches from bug 11578).
4/ Try to close the new budget: it is not possible, there is no
unreceived orders for this budget.
5/ You can close the inactive budget ("Close" link in the "Actions"
column).
6/ Verify the number of "Unreceived orders" is correct and select the
new budget in the budget list. Click on the "Move remaining unspent
funds" if you want to move unspent amounts.
7/ A report view is displayed and show you the ordernumber which have
been impacted (grouped by fund).
8/ Try different configuration, depending on the selected checkboxes.

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>