Go back to hard coded node names for `for_each`

For some reason this worked until it didn't

nomad/services/backups/backups.tf

@@ -12,10 +12,11 @@ data "consul_service" "nomad" {
 
 resource "nomad_job" "backups-oneoff" {
   # TODO: Get list of nomad hosts dynamically
-  for_each = toset([
-    for node in data.consul_service.nomad.service :
-    node.node_name
-  ])
+  for_each = toset(["n1", "n2"])
+  # for_each = toset([
+  #   for node in data.consul_service.nomad.service :
+  #   node.node_name
+  # ])
   jobspec = templatefile("${path.module}/backup.nomad", {
     module_path = "${path.module}",
     batch_node  = each.key,