changed "net" to "network" for ohpc, ood, and nodes modules

main.tf

@@ -97,7 +97,7 @@ module "nodes" {
     flavor = var.flavor
     key_pair = "${module.import-keypair.keypair_name}"
     compute_node_count = var.compute_node_count
-    internal_net = var.internal_net
+    internal_network = var.internal_network
 }
 
 # calls the outputs defined in the ohpc-instance module