Allow overriding all NixOS tests to run with the minimal kernel possible for that test's config(s) (based on requiredKernelConfig)

tests/default.nix

@@ -1,6 +1,6 @@
-{ system ? builtins.currentSystem }:
+{ system ? builtins.currentSystem, minimal ? false }:
 
-with import ../lib/testing.nix { inherit system; };
+with import ../lib/testing.nix { inherit system minimal; };
 
 {
   avahi = makeTest (import ./avahi.nix);
@@ -11,7 +11,6 @@ with import ../lib/testing.nix { inherit system; };
   ipv6 = makeTest (import ./ipv6.nix);
   kde4 = makeTest (import ./kde4.nix);
   login = makeTest (import ./login.nix);
-  minimal_kernel = makeTest (import ./minimal-kernel.nix);
   misc = makeTest (import ./misc.nix);
   mpich = makeTest (import ./mpich.nix);
   mysql = makeTest (import ./mysql.nix);

tests/minimal-kernel.nix

@@ -1,37 +0,0 @@
-{ pkgs, ... }:
-
-
-{
-  machine = { config, pkgs, ... }:
-    let
-      configfile = builtins.storePath (builtins.toFile "config" (pkgs.lib.concatStringsSep "\n"
-          (map (builtins.getAttr "configLine") config.system.requiredKernelConfig)));
-
-      origKernel = pkgs.linuxManualConfig {
-        inherit (pkgs.linux) src version;
-        inherit configfile;
-        allowImportFromDerivation = true;
-        kernelPatches = [ pkgs.kernelPatches.cifs_timeout_2_6_38 ];
-      };
-
-      kernel = origKernel //(derivation (origKernel.drvAttrs // {
-         configurePhase = ''
-           runHook preConfigure
-           mkdir ../build
-           make $makeFlags "''${makeFlagsArray[@]}" mrproper
-           make $makeFlags "''${makeFlagsArray[@]}" KCONFIG_ALLCONFIG=${configfile} allnoconfig
-           runHook postConfigure
-         '';
-       }));
-
-       kernelPackages = pkgs.linuxPackagesFor kernel kernelPackages;
-    in {
-      boot.kernelPackages = kernelPackages;
-    };
-
-  testScript =
-    ''
-      startAll;
-      $machine->shutdown;
-    '';
-}