Bug 21749: (QA follow-up) Add more tests for ImportFramework

Bug 21749: (QA follow-up) Add more tests for ImportFramework

This patch adds tests for:
- Output of ImportFramework on fields removal and error conditions (file
  not found)
- Different file format behaviour (csv, xml and ods are tested).

To test:
- Run
  $ kshell
 k$ prove t/db_dependent/ImportExportFramework.t
=> SUCCESS: All green :-D
- Sign off :-D

Note: the biblio_framework* files are based on the original one on the
patchset, and exported in 17.11 with different formats.

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>