Review dependencies on Python 2

[Pierre Labastie]

After working on the Python module page and some packages which depend on those module, I've realized that simple tweaks could remove the dependency on Python 2. Sometimes, it is as simple as changing #!/usr/bin/env python to #!/usr/bin/env python3 in some programs, which are otherwise Python 3 compatible. Sometimes, running 2to3 on some specific programs may be required.

This ticket is for showing advances in this respect. It is not expected to be fully completed for 8.4.

[Pierre Labastie]

List of Packages needing Python 2, with dependency status