Add role name and ARN to outputs (#8)

* Add role arn to outputs

* add execution_role_name output

Author: jwilson8767

outputs.tf

@@ -9,3 +9,11 @@ output "function_arn" {
 output "function_name" {
   value = var.name
 }
+
+output execution_role_name {
+  value = aws_iam_role.lambda_at_edge.name
+}
+
+output execution_role_arn {
+  value = aws_iam_role.lambda_at_edge.arn
+}