Added new output: azurerm_virtual_network_id

Author: vlad-m-r

output.tf

@@ -18,3 +18,7 @@ output "azurerm_route_table_default_name" {
 output "azurerm_virtual_network_name" {
   value = azurerm_virtual_network.main.name
 }
+
+output "azurerm_virtual_network_id" {
+  value = azurerm_virtual_network.main.id
+}