correct tests

[jkriwet]

At the moment, test_simulate and test_savepath_handling always fail.

The reason for this is, that when testing the functionality of simulating and providing a new savepath for the result files, the provided savepath is equal to the working directory.

Before copying the simulation results to the provided savepath, the algorithm first deletes any existing resultfiles in that savepath. Since the savepath is equal to the working directory, the algorithm deletes the results in the working directory, before it can copy those to the savepath.

Fix is to change the provided savepath.

Functionalitywise, it should probably be checked that either the provided savepath cant be equal to the working directory or that if it is the working directory, then no copying is done.