Fix testing ID of mock-definitions
Fix testing ID of mock-definitions

This isn't the best solution because all definitions now have to get the ID 'some_definition', but it's the best that I could come up with so far.

Contributes to issue CURA-3497.

Curahelper/Cura,ynotstartups/Wanhao,hmflash/Cura,Curahelper/Cura,fieldOfView/Cura,hmflash/Cura,fieldOfView/Cura,ynotstartups/Wanhao