Bug 26403: Use accounts include in account management pages

Bug 26403: Use accounts include in account management pages

This patch updates the credit and debit types management pages to use
the proper includes for handling system type translations.  This is how
it should have been done in the first place on the original bugs that
introduced the management of these types but for some reason I think it
got dropped during the QA process leading to confusion around these
system types with their fixed descriptions.

To test:
1. Apply patch
2. Apply the translations
   ./misc/translator/translate install xx-XX
3. In the staff interface, go to Administration > Credit types
   --> They should be translated
4. Go to Administration > Debit types
   --> They should be translated

Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>