WebSearch: CERN-specific primary collection guess
WebSearch: CERN-specific primary collection guess

* Dirty CERN-specific hack for the reogranized ATLAS collections.
  guess_primary_collection_of_a_record() should not always return
  the primary collection as guessed from the sole value of 980__a.

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