Bug 1953: refactoring C4::Koha::get_itemtypeinfos_of to eliminate potential SQL injection
C4::Koha::get_itemtypeinfos_of was not using plceholders, opening itself up to
potential SQL injection attacks. This patch refactors it to use placeholders to
bind parameters.
I also had to extend C4::koha::get_infos_of to allow us to pass bind parameters into it.
I'm including a test module for C4::Koha::get_itemtypeinfos_of.