Bug 15448: Filter out items hidden in OPAC on placing hold

Bug 15448: Filter out items hidden in OPAC on placing hold

This patch leverages on bug 24254's
Koha::Items->filter_by_visible_in_opac to filter out items that
shouldn't be presented to the end user in the OPAC interface.

To test:
1. Circulation and Fine rules for item-level holds are set to allow.
2. Setting the OpacHiddenItems preference to "ccode: [SUPPRESS]"
3. An item with collection Code Suppress is set.
4. Search for the title in the OPAC.
=> SUCCESS: The Suppress ccode item isn't shown.
5. View the detail page for the title.
=> SUCCESS: The suppress ccode item isn't shown.
6. Place a hold on the item:
  -- Click "Show more options"
  -- Select "A specific item"
=> FAIL: the ccode with the opachiddenitems rule has an item that appear in the list to place a hold
7. Apply this patch and repeat 6
=> SUCCESS: The item doesn't show!
8. Sign off :-D

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>