Sergei Trofimovich 3d40057509 spark: fix tests eval under allowAliases = false ...

Without the change `tests` eval fails as:

    $ nix build --no-link -f. spark.tests --arg config '{ allowAliases = false; }'
    error: attribute 'nixosTest' missing
           12|   };
           13|   testSparkCluster = { sparkPackage, ... }: pkgs.nixosTest ({
             |                                             ^
           14|     name = "spark";
       Did you mean nixosTests?

`nixosTest` is an alias defined as:

    pkgs/top-level/aliases.nix:  nixosTest = testers.nixosTest; # Added 2022-05-05

2023-12-31 22:47:55 +00:00

..

default.nix

spark: fix tests eval under allowAliases = false

2023-12-31 22:47:55 +00:00

spark_sample.py

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