examples working. Notes, testTwoServers stochastic is not working cause of the multiple runs issue and DecompositionOfBatches produces one less cause SimPy3 does not process events scheduled exactly for theend simulation time

main script to also initilize the environment so that tests run. TODO now code would no accept multiple runs

correction in main script so that it can run for infinite time. Problem that SimPy3 does not set env.now to last event, so reading from the last exit brought back there