Update repository to Fedora 31

[dawud]

Changes applied to the repository:

• Remove duplicated playbook site.yml appears unused, uses obsolete sudo syntax and a variable not used anywhere else in the role. Seems safe to drop the file

• Cosmetic changes to README.md Moved to GitHub flavoured markdown syntax Use language highlighting Break long lines Avoid bare URLs

• Update Vagrantfile to Fedora 31 Fedora 31 is available in Hashicorp's Vagrant Cloud Use consistent indentation, pin vm_box.version, add ansible compatibility mode

• Remove unneeded comments

• Move to new import syntax

• Update python requeriments, improve python detection logic

• Install dependencies on a single transaction, move dependencies definition to vars

• Update Travis test playbook, switch to podman

• Add simplified Dockerfile for Fedora 31, where systemd is included

[lukehinds]

awesome, thanks @dawud , will make sure I review tomorrow or very early next week.