BibUpload: fix FMT uploading
BibUpload: fix FMT uploading

* Fixes problem with uploading of FMT tags introduced in
  61ecf087c4cd3e0d8491e5be3ab2d9f28277d458.  (closes #870)

tiborsimko/invenio,inveniosoftware/invenio,tiborsimko/invenio,inveniosoftware/invenio