Bug 17214: Add records to lists by biblionumber

Bug 17214: Add records to lists by biblionumber

To test:
1) Apply patch and go to Lists
2) Click on an existing list or create a new list
3) Add items by barcode, confirm this functionality still works
4) Trigger error messages (adding duplicate barcodes, barcodes that
don't exist) to confirm they still show as appropriate
5) Test adding by biblionumber, confirm this works as expected
6) Trigger error messages (adding duplicate biblionumbers, biblionumbers
that don't exist). Confirm wording is appropriate in messages.
7) Add both barcodes and biblionumbers at the same time, confirm this
works as expected

Sponsored-by: Catalyst IT
Signed-off-by: Israelex A Veleña for KohaCon17 <israelex19@gmail.com>
Signed-off-by: Israelex A Veleña for KohaCon17 <israelex19@gmail.com>
Signed-off-by: Harold <harold.sabanal@gmail.com>
Signed-off-by: macon lauren KohaCon2017 <caballeromaricon@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Bug 17214: [FOLLOW-UP] Using Koha::Biblios instead of GetBiblio

Ready to test

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>