Bug 5337: EAN management : Adds ean for various searches

Bug 5337: EAN management : Adds ean for various searches

  - in various acquisition pages and serials home
  - in database : biblioitems.ean
  - adds ean and its mapping in default english bibliographic framework
  - adds ean mapping in default french bibliographic framework
  - ean search is not enabled for MARC21

The required mapping between the ean marc field and the biblioitems.ean
database field will be automatically added on an existing unimarc installation.

However, if you already have records with ean, you will have to
run misc/batchRebuildBiblioTables.pl to populate biblioitems.ean

Signed-off-by: jmbroust <jean-manuel.broust@univ-lyon2.fr>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Passed QA at second run. Removed a merge marker only.