validate that item images start with https

back-office/lib/tasks/ribica.rake

@@ -176,6 +176,11 @@ def handle_multimedia(item, row, index, logger, lookup)
 
     parts.each do |part|
         mmd = MultiMediaDescription.new
+
+        if part != "" and not part.start_with? "https://"
+          raise "Invalid url for the image: #{part}"
+        end
+
         mmd.url = part
         item.multi_media_descriptions << mmd
     end