Alexey-Marushchenko

1. Upgrade to support Ubuntu 18.04, 20.04, 21.04. Debian 10, 11, CentOS 8. 2. CentOS 7 inst. absent due to lack of modern libraries.

1. CentOS 8 pip upgrade solved. 2. Minor fixes.

Update main.yml

2

Current vagrant version is 2.2.18, mind to update hardcoded 2.2.5 to 2.2.18?