Fix Pidcat installation in Ubuntu

[barriosnahuel]

Describe the bug
When installing Ubuntu minimal flavor, we don't have python and we need it for running pidcat.
Also pidcat's README suggest to install it by adding it to PATH instead of creating an alias.

See https://github.com/JakeWharton/pidcat/#install

Expected behavior
It should work (by installing all its requirements) after any Ubuntu installation.

OS (please complete the following information):

• Ubuntu
• OS X