WebSearch: CERN-specific lecture latest additions
WebSearch: CERN-specific lecture latest additions

* CERN-specific selection of records to populate the latest
  additions for the lectures collections. (addresses #2068)

Signed-off-by: Ludmila Marian <e82cd4fb30962648dc4a4769a1bcc5e649b71d6b@gmail.com>
Reviewed-by: Tibor Simko <c7116e45300b163846dc01f3ed02116e3f8ef7a5@cern.ch>

tiborsimko/invenio,inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio