test: Follow-up upcoming caucase API changes.
The caucase site of this change is not released as an egg yet, but this is already causing failures in SlapOS.Eggs.UnitTest-Master.Python{2,3} tests runners.
The caucase site of this change is not released as an egg yet, but this is already causing failures in SlapOS.Eggs.UnitTest-Master.Python{2,3} tests runners.