Bug 13796: OPAC: Display rental charge for renewing

Bug 13796: OPAC: Display rental charge for renewing

This patch displays the rental fee that will be applied for
renewing (near "Renew" link on patron's summary page)

To test:
- Apply patch
- Enable system preference 'OpacRenewalAllowed'
- Verify that you have item types with and without rental fee
  for testing
- Issue items with an without rental fee to a patron
- In OPAC, display patron's summary page
- Verify in table 'Checked out', items with rental charge display an information as
  appropriate (near the link 'Renew')

Patch rewritten because of merge issues with previous patches. 2017-04-21 mv

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>