code: def create_fake_network_node(vapp_networks, network_name)
          parent_section = vapp_networks.css('NetworkConfigSection').first
          new_network = Nokogiri::XML::Node.new "NetworkConfig", parent_section
          new_network['networkName'] = network_name
          placeholder = Nokogiri::XML::Node.new "PLACEHOLDER", new_network
          new_network.add_child placeholder
          parent_section.add_child(new_network)
          vapp_networks
        end
docs: Create a fake NetworkConfig node whose content will be replaced later
  
   Note: this is a hack to avoid wrong merges through Nokogiri
   that would add a default: namespace