feat(composer_net): can define composer sa name

Author: safbenaich

modules/composer_net/iam.tf

@@ -38,8 +38,8 @@ Assign the Composer Worker (composer.worker) role.
 Assign the Service Account User (iam.serviceAccountUser) role
 ***/
 resource "google_service_account" "composer_sa" {
-  account_id   = "composer-sa"
-  display_name = "composer-sa"
+  account_id   = var.composer_sa_name
+  display_name = var.composer_sa_name
   project      = var.service_project_id
 }
 

modules/composer_net/variables.tf

@@ -77,3 +77,9 @@ variable "dns_zone_name" {
   type        = string
   default     = "composer-google-cloud-dns"
 }
+
+variable "composer_sa_name" {
+  description = "Service Account name to be used for running Cloud Composer Environment."
+  type        = string
+  default     = "composer-sa"
+}