Bug 21801: Make paycollect.pl pass library_id when calling ->pay

Bug 21801: Make paycollect.pl pass library_id when calling ->pay

This patch makes paycollect store the branchcode of the current library
when payments are done.

- Try all the possible options, specially selecting things to pay for (not
using the individual buttons).
- Check on the DB, that the  accountlines for the patron you're playin
with have the branchcode stored correctly in all cases:
  $ sudo koha-mysql kohadev
  > SELECT * FROM accountlines WHERE borrowernumber=<the_bn>;
=> SUCCESS: Things are as expected
- SIgn off :-D

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>