Base64 handling fix

Author: saiya

ecs_ec2_cluster_template/aws_launch_template.tf

@@ -16,7 +16,7 @@ resource "aws_launch_template" "main" {
   # returns a single list item then leave it as-is and remove this TODO comment.
   vpc_security_group_ids = concat([aws_security_group.main.id], var.additional_security_groups)
 
-  user_data = base64encode(data.template_cloudinit_config.main.rendered)
+  user_data = data.template_cloudinit_config.main.rendered
 
   monitoring {
     enabled = var.ec2_enable_monitoring

ecs_ec2_cluster_template/template_cloudinit_config.tf

@@ -1,7 +1,8 @@
 data "template_cloudinit_config" "main" {
   # https://github.com/hashicorp/terraform/issues/11488
+  # https://github.com/terraform-providers/terraform-provider-aws/issues/497
   gzip          = false
-  base64_encode = false
+  base64_encode = true
 
   part {
     content_type = "text/x-shellscript"