Bug 26132: (follow-up) Add test to show errors in max issues amount calculation

Bug 26132: (follow-up) Add test to show errors in max issues amount calculation

If you set default branch limits for issue quantity circulation
rules you will get errors when calling TooMany function.

To reproduce the error:
1) Apply this patch
2) Run prove t/db_dependent/Circulation/TooMany.t and notice the
   following error:

No method count found for Koha::Checkouts DBIx::Class::Storage::DBI::_dbh_execute(): DBI Exception: DBD::mysql::st execute failed: Unknown column 'item.homebranch' in 'where clause' [...]

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>