added ssh host output from post packer module main

main.tf

@@ -18,3 +18,10 @@ output "packer_internal_network_id" {
   value = "${module.packer-modules.internal_network_id}"
 }
 
+module "post-packer-modules" {
+    source = "./post-packer-modules"
+}
+
+output "ssh_host" {
+    value = "${module.post-packer-modules.external_network_id}"
+}