Make system setups shorter using automatic connections

[k-rieck]

• use automatic default connections in system_setups: my_sim.add_component(..., connect-automatically=True)
• when a connection is made in component.connect_input() -> append to component_connections.json file in results folder to get a list with all connections in order to check later if right connections were made
• a test is still needed to check if with automatic connections, no changes were made!