BibSched: post-process data exchange
BibSched: post-process data exchange

* Adds the ability for tasks to transfer arbitrary data to BibTasklets
  specified via the `--post-process=` argument via a new task parameter
  `post_process_params`.

Co-authored-by: Jan Aage Lavik <8d55e006a1b29770f275a5c59a7341f17f8e69d5@cern.ch>
Signed-off-by: Georgios Papoutsakis <1dfd6f81ed6753deb22b318bd8b82b48e2fe807e@cern.ch>

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