add simulation seed and fixed seed to scenario file.
Changes: * Add UseFixedSeed (bool switch) and fixedSeed Attribute values This allows to rerun the simulation with different but fixed seeds for random numbers. * Add simulationSeed to save currently used seed while simulation is running. This is useful to determine the seed used for processor outputs in the output directory. * Add Test for new version and refactor code duplicates * Change Hash calculation to exclude UseFixedSeed, fixedSeed and simulationSeed to highlight (green) output to selected scenario within the gui.