Bug 5801 - C4::Circulation::_GetCircControlBranch wrongly used in opac-reserve.pl

Bug 5801 - C4::Circulation::_GetCircControlBranch wrongly used in opac-reserve.pl

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
All tests and perlcritic pass.

Tests done:
holds policy vs. circulation rules seemed to make the difference for me,
I am not totally sure why that is, but see no reason to fail this patch as
results are ok.

System preferences
- CircControlBranch = the library the item is from
- ReservesControlBranch = patron's home library

Circulation rules
- Library A - Holds policy: Books can not be put on hold.
- Library B - Holds policy: Books can be put on hold. (no special setting needed)

Catalog data
- A record with an item for library B, itemtype Books.

Test without patch:

1) Patron A (home library A) places a hold in OPAC on an item from library B.

Should be: hold is NOT allowed.
Before patch: hold IS allowed.
After patch: hold is NOT allowed.
OK

2) ReserveControlbranch = item's home library
Patron A (home library A) places a hold in OPAC on an item from library B.

Should be: hold is allowed.
Before patch: hold is allowed.
After patch: hold is allowed.
OK

3) ReservesControlBranch = patron's home library
Circulation rules: Remove hold policy for library B.
Library A: no holds allowed for books using 'Holds allowed (count)' = 0
Library B: 5 holds allowed for books using 'Holds allowed (count)' = 5
Patron A (home library A) places a hold in OPAC on an item from library B.

Should be: hold is NOT allowed
Before patch: hold is NOT allowed
After patch:  hold is NOT allowed
OK

4) ReserveControlbranch = item's home library

Should be: hold is allowed
Before patch: hold is allowed
After patch:  hold is allowed
OK
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>