This sript refreshes all GET queries. Because of that some tests had to be modified. And api resposnes are reproducible now (sets results are changed to a "sorted" set, so with every query we should have the same response).
Second big change is that overlay iamages are stored differently (there are no overlays in submaps anymore)

some logic moved to init function

some logic moved to init method

code was referencing to this, but it should reference to self

tests passes, but code for sure needs to be improved