[-] MO : Ogone : insecure content fix

Some browsers block insecure content from being loaded in a secure page.
Replacing ${base_dir} by ${content_dir} allows these items to be called
over SSL if SSL is being used, removing the issue.  Fix has been running
for 2 weeks on a production site.
Merge branch 'master' of https://github.com/mendesk/PrestaShop-modules into mendesk-master
// Ogone : Module version updated