Assets discovery import: Don't overwrite user-inserted attributes

[Maximilian Hövelmann _Jodocus_]

Assets for JSM Cloud.

One of our customers has an object schema set up with an automated discovery import.

After importing, the user manually changed some attributes on some of the objects created during the import. 

However, during the next import, the user-defined data get's overwritten again by the data imported.

Is there any way of prioritizing user data over the imported data when updating the objects during import?