Bug 21903: koha-dump can export uploaded and temporary uploaded files

Bug 21903: koha-dump can export uploaded and temporary uploaded files

Sponsored-by: Orex
Test plan:
 - Apply the patch
 - Try using koha-dump without any option
 - Try using koha-dump with --uploaded_files
 - Try using koha-dump with --uploaded_temp_files
 - Try using koha-dump with both of the options above

Expected results: the .tar.gz dump will include uploaded and/or temporary
uploaded files if requested.

Signed-off-by: Hugo Agud <hagud@orex.es>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>