Bug 14434: Display "Not renewable (on hold)" in OPAC

Bug 14434: Display "Not renewable (on hold)" in OPAC

This patch makes the OPAC display "Not renewable (on hold)" when
a hold is placed.

Test plan:
1) Do not apply patch.
2) Issue an item with automatic renewal.
3) Issue an item with manual renewal.
4) Place a hold on both items.
5) Log in as patron and note that the column "Renew" says "Automatic
   renewal (x of y renewals remaining)" for the auto renewed item
   and "(On hold) for the other item.
6) Apply patch.
7) Refresh OPAC and note that now "Not renewable (on hold)" is displayed
   for both items.
8) Cancel the holds, then log in as patron again and confirm that the
   correct renewal conditions are displayed.

Sponsored-by: Hochschule für Gesundheit (hsg), Germany
Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as advertised

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>