WebSearch: fix of SPIRES to Invenio keyword translation

* Edits _SPIRES_TO_INVENIO_KEYWORDS_MATCHINGS and
  _INVENIO_KEYWORDS_FOR_SPIRES_PHRASE_SEARCHES in search_engine_parser.py
* Adds unit tests for the new mappings
* Adds new 'address' field and relative tag mapping (in tabfill and with a new
  upgrade script)
* Adds new 'note' field and relative tag mapping (in tabfill and with a new
  upgrade script)

Signed-off-by: Federico Poli <federico.poli@cern.ch>