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
base: adaptation to new search form from invenio

* Changes usage of search_form macro to include
  of search/form/index.html.

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>
Tested-by: Javier Martin Montull <javier.martin.montull@cern.ch>
fixtures: knowledge base fixtures

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>
base: removal of redundant 'Data' at fixtures names

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>