Bug 12166: (follow-up) Remove 'Reserve Charge' from descriptions in accountlines

Bug 12166: (follow-up) Remove 'Reserve Charge' from descriptions in accountlines

With the prior 'Hold fee' will be displayed in OPAC and staff, so
the 'Reserve Charge' would just be an untranslatable double up
of information.

To test:
- Make sure you create some Reserve Charges prior to applying this
  patch set
- Verify they show in staff and OPAC account
- Apply patch
- Run database update
- Verfy the "Rental Charge - " is gone and old and new entries
  match now

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>