Correct secgroup var on module instance

main.tf

@@ -93,6 +93,7 @@ module "nuxeo" {
   os_release = "${os_release}"
   instance_type = "${var.instance_type}"
   public_key_path ="${var.public_key_path}"
+  secgroup = ["${module.net.sg_internal_id}"]
 #  public_key_path="/path/to/my/pub_key"
   subnet_id="${element(module.net.private_subnets, 0)}"
 }