PostgreSQL install

This postgreSQL role, install PostgresSQL using debian packages from postgres official APT repository.

Specific configurations, if there are some, should use the git based config pattern.

It takes some portion from OSM France ansible-script repository

Defaults

---
# If you don't want last version of Postgres, specify it here
# It must be a version supported by Postqres official APT apt_repository
postgresql__version: ""