Right now the container uploader maps the image's subvariant to a repository name. This leads to some confusion in the config since ELN and Fedora can have very similar subvariant names (e.g. Fedora toolbox is Container_Toolbox and ELN is container-toolbox).

We should adjust the config to include the variant in addition to the subvariant to help differentiate them. This could either be done by having separate config sections per variant, basically a nested dictionary, or by just concatenating the two together like {variant}_{subvariant}.

This change will need to be coordinated with an update to the config in Ansible, of course.