workflows: template naming fix

* Removes the hp prefix from holdingpen templates.

Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
jsonalchemy: validation fixes

Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
uploader: typos fixes

Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
records: better PID list

Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
uploader: files to link addition

* Adds new option for linking files with record via custom FFL MARC
  field.

* Adds `legacy` step to uploader insert worflow for filling-up "bibxxx"
  tables.  (addresses #1772)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
previewer: addition of support for Documents

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
uploader: support for relative document paths

* Allows specifying relative paths in FFT tags.  (closes #1191)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
groups: port missing functionality

* Adds implementation of user group manage function.

* Adds filter on list of group that user can join.

Signed-off-by: Leonardo Rossi <leonardo.r@cern.ch>