Bug 23426: (follow-up) This patch reintroduces the former implementation of fine...

Bug 23426: (follow-up) This patch reintroduces the former implementation of fine items

The original implementation of fine items was accidently overwritten with this patch. This follow up reverts these changes but keeps additional improvements that were also part of this patch.
These are:
- Returning the active currency as part of the response (BH)
- Fixing the number of items in the response which are specified in BP and BQ when other items as fine items are requested.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>