Draft: Add Python Netbox client

Decision Record

The current PoC of "Dockerized NGINX+" has an agent, implemented in Python, which interacts with Netbox, especially the RPS plugin. The Netbox client part needs to be extracted into a new library, usable by everyone (and later on, an Ansible Module as well).

The client has to meet the following requirements:

• log every call to the Netbox API and their response, so that the CMDB squad is able to map the usag of Netbox across the European Commission
• support all Netbox plugin made available by the CMDB squad

Changes

• Wraps official pynetbox client
• Log every call to the API and their result
• Add support for RPS plugin
• Add support for DNS plugin
• Add support for Certificates plugin
• Add support for Docker plugin
• Add complete test suite
• Add CI pipeline to publish package to Gitlab's package registry