We don't want the registry to spit out disabled definitions. For once, we don't have disabled definitions and no way of filtering them, that should be solved.

Also, the customers of the asset registry should be able to filter those disabled definitions and use this information e.g. in the asset chooser to their benefits.

User story:

• As a user, I don't want to show disabled configurations
• As a user, I would like to enable/disable definitions