BibMatch: 'fuzzy' result mode addition

* Adds a new result mode called 'fuzzy' that can be used in
  validation rule-sets to allow one rule to fail validation and
  marked instead as a "fuzzy" match.

* Amends the regression test to check local restricted collection
  matching ONLY if the CFG_SITE_SECURE_URL is set to HTTPS protocol.
  (Otherwise the InvenioConnector returns an error.)

* Adds tests and amends documentation for the added feature.

* NOTE Amends the default Invenio config to put an example fuzzy rule.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
BibSched: authorization typo fix in bibtasklet

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
BibAuthorID: error handling in affiliations engine

* The process does not crash anymore in case of inconsistent
data, but proceeds gracefully.

Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>
BibAuthorID: more error handling in affiliations

* Gracefully continue in case of data corruption