* 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/hooks/test_yandexcloud_dataproc.py
self._init_hook()
        self.hook.client.delete_cluster('my_cluster_id')
        assert create_operation_mock.called
    @patch('yandexcloud.SDK.create_operation_and_get_result')
    def test_create_hive_job_hook(self, create_operation_mock):
        self._init_hook()
        self.hook.client.create_hive_job(
            cluster_id='my_cluster_id',
            continue_on_failure=False,
            name='Hive job',
            properties=None,
            query='SELECT 1;',
            script_variables=None,
        )
        assert create_operation_mock.called
    @patch('yandexcloud.SDK.create_operation_and_get_result')
    def test_create_mapreduce_job_hook(self, create_operation_mock):