Bug 25007: Check for normaalized ISBN when building Amazon link

Bug 25007: Check for normaalized ISBN when building Amazon link

TO RECREATE:
-Have Amazon images turned on and local images too.
-Have a record with a local cover image
-Make sure the record has no ISBN in 020 field.
-Load detail page of that record and see that the local cover images is
 not on the right hand side like it should be but forced underneath
 'catalogue_detail_biblio' in an odd spot.
-Apply patch and reload page
-The image should be back in its normal spot

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>