Reorganize complex functions and adjust flake8 conf appropriately

[SeBecker]

So far our flake8 configuration file ignores complexity issues. We have to reorganize some functions. This concerns in particular:

• print_info in simulate/simulate_auxiliary.py
• print_logfile and write_comparison in estimate/estimate_output.py
• test2 and test4 in test/test_unit.py
• check_types and process in red/red_auxiliary.py
• read_desc in test/auxiliary.py
• generate_random_dict and print_dict in test/random_init.py