* Use the maas snap for the maas-cli stuff, as there is no recent maas-cli deb
* update the way to tag a node, which now works
* put back the double ampersand for creating the VM
* The script now adds N control nodes at the beginning
* Adds 4 extra interfaces, VLANs in my environment
* Adds the VMs to MAAS, commissions them, and updates the interfaces.
* Add a function that just wipes the VM disks, for re-purposing.
This allows to release the machines in MAAS, and then re-use them
without having to re-add/commission the machines.
