Bug 27204: Fix end boundary index, never return results for non-existant accountlines

Bug 27204: Fix end boundary index, never return results for non-existant accountlines

There are two primary issues I've identified with requesting line items
for fees via SIP:

1) The end boundary is incorrect. For example, if send a request with a
BP ( starting item) of 1, and a BQ (end item) of 1, I should get just
the first item. Instead I will get two items

2) Our SIP server does not check bounds. For example, if I have 3 fines,
but I send a BP of 1 and a BQ of 5, I will get back 5 AVs, two of
them being "empty" because the patron only has 3 accountlines!

Test Plan:
1) Apply the unit test patch
2) prove t/db_dependent/SIP/Patron.t
3) Note the failures
4) Apply the second patch
5) prove t/db_dependent/SIP/Patron.t
6) All tests should pass!

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 0a5232412fee9a9811b7354c8ea98ee889eaee3c)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>