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>