nixpkgs/nixos/tests/common
Arthur Gautier a32dbada18 nixosTests: fixup tests/common/resolver to work with a local resolver
When 757a455dde refactored the zones to go
from a list to a map, this broke the tests/common/resolver helper.

reproduction:
```
let
  pkgs = import <nixpkgs> {};

  testConfig = {
    name = "resolver-repro";
    nodes = {
      acme = { nodes, ... }: {
        imports = [ (pkgs.path + /nixos/tests/common/acme/server) ];
      };
    };

    testScript = ''
    '';
  };
in pkgs.nixosTest testConfig
```
2024-10-06 15:18:45 +00:00
..
acme
webroot
auto-format-root-device.nix
auto.nix
ec2.nix
gpg-keyring.nix
resolver.nix
user-account.nix
wayland-cage.nix
x11.nix