Tests: Investigate OrderedModelManager warning for Sponsor models #2743
Description
Investigate separately these non-failing warnings
WARNINGS:
SponsorshipBenefit: (ordered_model.W003) OrderedModelBase subclass has a ModelManager that does not inherit from OrderedModelManager. This is not ideal but will work.
SponsorshipPackage: (ordered_model.W003) OrderedModelBase subclass has a ModelManager that does not inherit from OrderedModelManager. This is not ideal but will work.
Originally posted by @JacobCoffee in #2741 (comment)