As a result, clusterconfigurator no longer pesses with hardcoded sys.path, we now use PYTHONPATH, which is somewhat cleaner.
As mypy doesn't support python2, I had to migrate code from python2 to python3. Because some libraries are shared between all python code, python2 code using these libraries will be broken while all python code is not upgraded to python3.
Bug 2701 - mettre en place un mécanisme pour éviter le blocage des gpu par des jobs cpu