def create_port(network, subnet = nil, device = nil, device_owner = nil)
      data = {
        'port' => {
          'network_id' => network,
        }   
      }
      unless device_owner.nil?
        data['port']['device_owner'] = device_owner
      end
      unless device.nil?
        data['port']['device_id'] = device
      end
      unless subnet.nil?
        data['port']['fixed_ips'] = [{'subnet_id' => subnet}]
      end
  
      puts data

      return post_request(address("ports"), data, @token)
    end
def create_port(network, subnet = nil, device = nil, device_owner = nil)
      data = {
        'port' => {
          'network_id' => network,
        }   
      }
      unless device_owner.nil?
        data['port']['device_owner'] = device_owner
      end
      unless device.nil?
        data['port']['device_id'] = device
      end
      unless subnet.nil?
        data['port']['fixed_ips'] = [{'subnet_id' => subnet}]
      end
  
      puts data

      return post_request(address("ports"), data, @token)
    end
Create a new port given network and device ids, optional
 parameter subnet id allows for scoping the port to a single subnet.