[QuantityPriceRules] Suspend Unit Definition Inheritance with custom Variant QPR

[solverat]

Q	A
Bug report?	sort of
Feature request?	no
BC Break report?	no
RFC?	no

Initial Position

I have a main product with a defined unit definition and also one quantity price rule with various price ranges. If I'm adding a new variant to my new main product, all information will be inherited. As long as I don't change anything, everything works as expected.

Issue

If I'm going to change a price in a specific range of my variant, the QPR will be generated independently for the variant - but not the unit definition.

Solution

After the QPR range of my inherited variant has been changed, we also need to resolve the unit definition inheritance.