Update classmaprouletteloader.py & added loadertest.py

Updated create payPayload method of mapRouletteTask object.
Needed to change key for geometries.

Updated uploadTasks method of mapRouletteChallenge object.
PUT not POST method.

Verified that objects+methods of classmaprouletteloader.py works correctly.
See loadertest.py that test methods (sorry not unit test right now).