* and stop setting default values in python operator code, so defaults can be set at the server side.

This issue is just for the PR and questions from maintainers. 
tests/providers/yandex/operators/test_yandexcloud_dataproc.py
},
        )
        context = {'task_instance': MagicMock()}
        context['task_instance'].xcom_pull.return_value = 'my_cluster_id'
        operator.execute(context)
        context['task_instance'].xcom_pull.assert_has_calls(
            [
                call(key='cluster_id'),
                call(key='yandexcloud_connection_id'),
            ]
        )
        create_pyspark_job_mock.assert_called_once_with(
            archive_uris=['s3a://some-in-bucket/jobs/sources/data/country-codes.csv.zip'],
            args=[
                's3a://some-in-bucket/jobs/sources/data/cities500.txt.bz2',
                's3a://some-out-bucket/jobs/results/${{JOB_ID}}',
            ],
            cluster_id='my_cluster_id',
            file_uris=['s3a://some-in-bucket/jobs/sources/data/config.json'],
            jar_file_uris=[
                's3a://some-in-bucket/jobs/sources/java/dataproc-examples-1.0.jar',
                's3a://some-in-bucket/jobs/sources/java/icu4j-61.1.jar',
                's3a://some-in-bucket/jobs/sources/java/commons-lang-2.6.jar',
            ],
            main_python_file_uri='s3a://some-in-bucket/jobs/sources/pyspark-001/main.py',
            name='Pyspark job',
            properties={'spark.submit.deployMode': 'cluster'},
            python_file_uris=['s3a://some-in-bucket/jobs/sources/pyspark-001/geonames.py'],
        )