BibAuthorID: Fix for the computation of the most relevant author's name.

* The most relevant name of an author is no longer being normalised.
* The name returned is the most relevant name variant for the author.

Signed-off-by: Samuele Carli <samuele.carli@cern.ch>
Signed-off-by: Artem Tsikiridis <artem.tsikiridis@cern.ch>
BibAuhorID: prevent running non test funcs
testutils: switch to unittest2
travis: parallelize unit tests
BibIndex: reliable tests cleanup
WebSearch: date operators `<=` and `>=`

* Replaces the SPIRES operators `<=` and `>=` with
  the Invenio operators before the equal signs removal
  and before replacing the date before/after operators

* Adds unit tests to the query parser

Signed-off-by: Federico Poli <federico.poli@cern.ch>
OPS: BibAuthorID: skip failing tests