Simplify defaults for container IDs in fixtures
Simplify defaults for container IDs in fixtures

Contributes to issue CURA-3497.

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