kept only name and ip as keepers for the random_string ressource for the servers

modules/host/main.tf

@@ -9,9 +9,6 @@ resource "random_string" "server" {
     # We re-create the id (and server) whenever one of those attributes
     # changes.
     name         = var.name
-    public_key             = var.public_key
-    additional_public_keys = join(",", var.additional_public_keys)
-    placement_group_id     = var.placement_group_id
     private_ipv4 = var.private_ipv4
   }
 }