Revert "reverted changes for network argument"

This reverts commit a601f10.

examples/simple_example/main.tf

@@ -67,7 +67,7 @@ module "dataflow-job" {
   template_gcs_path     = "gs://dataflow-templates/latest/Word_Count"
   temp_gcs_location     = "${module.dataflow-bucket.name}"
   service_account_email = "${var.service_account_email}"
-  network_name               = "${module.vpc.network_name}"
+  network_self_link     = "${module.vpc.network_self_link}"
   subnetwork_self_link  = "${module.vpc.subnets_self_links[0]}"
   machine_type          = "n1-standard-1"
 
@@ -87,7 +87,7 @@ module "dataflow-job-2" {
   template_gcs_path     = "gs://dataflow-templates/latest/Word_Count"
   temp_gcs_location     = "${module.dataflow-bucket.name}"
   service_account_email = "${var.service_account_email}"
-  network_name               = "${module.vpc.network_name}"
+  network_self_link     = "${module.vpc.network_self_link}"
   subnetwork_self_link  = "${module.vpc.subnets_self_links[0]}"
   machine_type          = "n1-standard-2"
 

main.tf

@@ -25,7 +25,7 @@ resource "google_dataflow_job" "dataflow_job" {
   temp_gcs_location     = "gs://${var.temp_gcs_location}/tmp_dir"
   parameters            = "${var.parameters}"
   service_account_email = "${var.service_account_email}"
-  network               = "${var.network_name}"
+  network               = "${replace(var.network_self_link, "/(.*)/networks/(.*)/", "$2")}"
   subnetwork            = "${replace(var.subnetwork_self_link, "/(.*)/regions/(.*)/", "regions/$2")}"
   machine_type          = "${var.machine_type}"
 }

variables.tf

@@ -64,8 +64,8 @@ variable "subnetwork_self_link" {
   default     = ""
 }
 
-variable "network_name" {
-  description = "The name of the network to which VMs will be assigned."
+variable "network_self_link" {
+  description = "The network self link to which VMs will be assigned."
   default     = "default"
 }