docs: def add_vm_ethernet_ports(self):
          """
          Add ethernet ports to Virtualbox and Qemu nodes
          """
          for i in range(self.node['properties']['adapters']):
              port = {'id': self.port_id,
                      'name': 'Ethernet%s' % i,
                      'port_number': i}
              self.node['ports'].append(port)
              self.port_id += 1