fishtest Pyramid project files outdated

[ppigazzini]

The fishtest Pyramid project files are now a bit outdated with respect to those created with the latest Pyramid cookiecutter https://docs.pylonsproject.org/projects/pyramid/en/latest/narr/project.html

The latest version of setuptools (60.9.0) just released doesn't work with our setup.py format.

python3 -m venv env
env/bin/python3 -m pip install --upgrade pip
env/bin/python3 -m pip install --upgrade cookiecutter
env/bin/python3 -m pip cookiecutter gh:Pylons/pyramid-cookiecutter-starter

[ppigazzini]

Fast fix to work with latest setuptools #1281