WebSearch: improve detection of record owners
WebSearch: improve detection of record owners

* If CFG_CERN_SITE, consider the possibility of the owner
  of a record being an egroup, defined as 'foo@cern.ch'
  insted of 'foo [CERN]'. (addresses #2068)

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

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