config: language problem fix

* Fixes an issue where resetting the sitename would break
  due to missing names for all languages.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch
fixtures: oai_harvest update to arXiv math harvest
search: facets by collection adaptation

* Adds fixtures for inspire.

* Adds inspire collection facet.

Signed-off-by: Kamil Neczaj <kamil.neczaj@gmail.com>