Bug 14571 - More switching of Amazon image source URL to https

 Bug 14571 - More switching of Amazon image source URL to https

       modified:   modules/opac-opensearch.tt
       modified:   modules/opac-results-grouped.tt
       modified:   modules/opac-shelves.tt
       modified:   modules/opac-showreviews-rss.tt
       modified:   modules/opac-showreviews.tt

Basically, just inspect these places and make sure the Amazon images are
using https://images-na instead of http://images

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>