Ownable has instrumentGroup as a property #43
Description
Ownable is used as the superclass for things like Sample and Proposal, neither of which have an instrumentGroup property according to the scicat api: https://scicatproject.github.io/api/#operation/Sample.create https://scicatproject.github.io/api/#operation/Proposal.create
Changing Ownable could be an easy fix, but it may break other things.