Fix Zenodo integration test

[Panaetius]

     @pytest.mark.integration
    @retry_failed
    @pytest.mark.vcr
    def test_dataset_export_upload_failure(runner, tmpdir, project, zenodo_sandbox):
        """Test failed uploading of a file to Zenodo deposit."""
        result = runner.invoke(cli, ["dataset", "create", "my-dataset"])
    
        assert 0 == result.exit_code, format_result_exception(result) + str(result.stderr_bytes)
        assert "OK" in result.output
    
        # create data file
        new_file = tmpdir.join("datafile.csv")
        new_file.write("1,2,3")
    
        # add data to dataset
        result = runner.invoke(cli, ["dataset", "add", "--copy", "my-dataset", str(new_file)])
        assert 0 == result.exit_code, format_result_exception(result) + str(result.stderr_bytes)
    
        result = runner.invoke(cli, ["dataset", "export", "my-dataset", "zenodo"])
    
        assert 1 == result.exit_code, result.output + str(result.stderr_bytes)
>       assert "metadata.creators.0.affiliation" in result.output
E       AssertionError: assert 'metadata.creators.0.affiliation' in ''
E        +  where '' = <RenkuResult KeyError('errors')>.output

This test has been failing in CI for a while, so it's unlikely that it's just due to Zenodo being flaky.

We should investigate this

[Panaetius]

This doesn't happen anymore/was already fixed