Bug 23414: Prefetch transfers, use only default framework, use elsif

Bug 23414: Prefetch transfers, use only default framework, use elsif

This further cleans up the code, before we tested each condition though we return only one status line.

Koha mappings can no longer differ by framework so we don't need to fetch the biblio framework

Prefetching should offer a boost

To test:
Same as before - there is not as big a boost form this, but there shouldn't be a hit

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>