Bug 14237: Add individual bibliographic records to course reserves

Bug 14237: Add individual bibliographic records to course reserves

This feature allows a patron to add bibliographic records to course
reserves. They can be added individually or in a batch. The courses that
have reserved this record will also show on the record's detail page.

To test:
1) Update database, refresh schema, and restart services
2) Enable the system preference UseCourseReserves
3) Set up a couple of biblios and a couple of items (attached to
    different biblios)
4) Go to Course Reserves and add a new course
5) Click Add reserves and put something in both the barcode field and
biblionumber field. Click submit and confirm you get an error.
6) Add a barcode in the barcode field and submit. Confirm the item is
reserved for the course as expected.
7) Add a biblionumber in the barcode field and submit. Add notes and
Save. Confirm the record is reserved for the course as expected and the
notes are saved correctly.
8) Edit the record-level course reserve that you just added. Confirm the
correct record shows and any edits save as expected.
9) Go back to the course and try removing reserves. Use both the Remove
action button for individual reserves and the Remove all reserves
button. Confirm both work as expected.
10) Go to Batch add reserves and put something in both the barcodes
field and biblionumbers field. Click submit and confirm you get an
error.
11) Remove the barcodes and put some biblionumbers in the biblionumbers
field. Add notes and Submit. Confirm the records are all added as
expected.
12) Click on one of the biblios that has been reserved for the course.
Confirm that the course shows under 'Courses that have reserved this
title' on the biblio detail page.
13) Go back to the course and click Add reserves. Try and add a
biblionumber that is already reserved. Confirm it detects that the
biblio has already been reserved.

Sponsored-by: Bibliotheksservice-Zentrum Baden-Württemberg (BSZ)
Signed-off-by: Christian Stelzenmüller <christian.stelzenmueller@bsz-bw.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>