Update aws_auth.tf

Revert this due to terraform-aws-modules#611

Author: max-rocket-internet

aws_auth.tf

@@ -53,7 +53,7 @@ resource "kubernetes_config_map" "aws_auth" {
   data = {
     mapRoles    = <<EOF
 ${join("", distinct(concat(data.template_file.launch_template_worker_role_arns.*.rendered, data.template_file.worker_role_arns.*.rendered)))}
-%{if var.map_roles != []}${yamlencode(var.map_roles)}%{endif}
+%{if var.map_roles == []}${yamlencode(var.map_roles)}%{endif}
     EOF
     mapUsers    = yamlencode(var.map_users)
     mapAccounts = yamlencode(var.map_accounts)