- add script and Vagrantfile code to preseed salt minion keys
- add needed bootstrap_options for Python 3 support
- add grains files and populate those of the ldap and web node
- add script to fix systemd-networkd setup with Debian libvirt Vagrant
images
- switch from VirtualBox to libvirt
This commit defines a multi machine Vagrant setup with internal
networking and the gnuviechadmin Git repositories mounted as shared
folders inside the corresponding virtual machines.
The contained bootstrap.sh clones all Git repositories and runs Vagrant
in the correct order.
