fix parameter value for iam role module, update version (#6)

* use resource module to generate random id

* upgrade iam role module version

* fix parameter value for iam role module

* update iam role module version

main.tf

@@ -1,9 +1,8 @@
 module "lambda_role" {
-  source = "github.com/traveloka/terraform-aws-iam-role//modules/lambda?ref=v0.4.2"
+  source = "github.com/traveloka/terraform-aws-iam-role//modules/lambda?ref=v0.4.4"
 
   product_domain   = "${var.product_domain}"
-  service_name     = "${var.lambda_name}"
-  descriptive_name = "Role for lambda ${var.lambda_name}"
+  descriptive_name = "${var.lambda_name}"
 }
 
 resource "aws_iam_role_policy_attachment" "lambda_basic_role" {