Bug 9184: Acq - Don't show authority batches when ordering from staged file

Bug 9184: Acq - Don't show authority batches when ordering from staged file

When ordering from a staged file, the list of files
should only include imports of bilbiographic and
no authority data.

To test - start without the patch:
1) Stage an authority file
2) Stage a bilbiographic file
3) Create a new basked in acquisitions
4) Create a new order line selecting "From a staged file"
5) Verify that both files are shown
6) Apply patch
7) Verify that only the bibliographc file shows
   in the list now

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as advertised

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>