Use a python virtual environment for every module

[davideaimar]

We can multiple python virtual environments for managing dependencies of every module.

Ideas:

• create a venv folder not committed inside every module python3 -m venv /path/to/new/venv.
• create a requirements.txt file inside every module that contains all the versioned dependencies of that module (can be done using `pip freeze > requirements.txt)
• activate the venv using source venv/bin/activate, check if you are in the venv just by looking at the benginning of the line, you should have (venv) written. (we also have to use this environment in the services)
• install the dependencies using pip install requirements.txt (they will be installed only for that specific environment)