Bug 6874: (QA followup) Attach files to bibliographic records

Bug 6874: (QA followup) Attach files to bibliographic records

* Renames uploadPath to upload_path to follow the standard naming
  conventions in koha-conf which use underscores rather than camel case
* Remove reference to intranet-tmpl and replace with [% interface %]
  required to pass qa

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>