BibHarvest: fixes for PoS

* Fixes Docstring.

* Adds FFT__o:INSPIRE-PUBLIC subfield.

Signed-off by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
BibTasklets: bugfix for CONSYN.

Signed-off by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>