Factorize simplejson

See merge request !64

Standardize simplejson

Closes #73

See merge request !63

No need for version detection in this case

No need for version detection in this case

Code cleanup

See merge request !62

The named tuple was not used.

- black
- debug-statements
- bandit

These files are explicitly wrong to test that the system is
working as expected when encountering such errors.

The network created during a test run was not properly deleted.