The Vagrantfile creates a basic up-to-date VirtualBox image
with Ubuntu Server 16.04 LTS and all dependencies required
to run Tox and DevStack.
Provided Vagrantfile requires Vagrant, Virtual Box. A fast
internet connection it is recommended.
If environment variables like http_proxy, https_proxy and no_proxy
it will assume a proxy connection is required to download
archives from upload repositories. In such cases
Vagrant plugin vagrant-proxyconf is required to provide proxy
enviroment to provided virtual machine.
Closes-Bug: #1606338
Change-Id: I5fc5060d78276ec5b801118d8d6873f0071ecad9
6356c05194