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**Description**

DatabricksRunNowOperator is missing the option to take in key word arguement _jar_params_ , it already can take the other ones notebook_params,python_params,spark_submit_params. https://docs.databricks.com/dev-tools/api/latest/jobs.html#run-now


**Use case / motivation**

Provide parity with the other options

tests/providers/databricks/operators/test_databricks.py
}
NEW_CLUSTER = {'spark_version': '2.0.x-scala2.10', 'node_type_id': 'development-node', 'num_workers': 1}
EXISTING_CLUSTER_ID = 'existing-cluster-id'
RUN_NAME = 'run-name'
RUN_ID = 1
JOB_ID = 42
NOTEBOOK_PARAMS = {"dry-run": "true", "oldest-time-to-consider": "1457570074236"}
JAR_PARAMS = ["param1", "param2"]
RENDERED_TEMPLATED_JAR_PARAMS = [f'/test-{DATE}']
TEMPLATED_JAR_PARAMS = ['/test-{{ ds }}']
PYTHON_PARAMS = ["john doe", "35"]
SPARK_SUBMIT_PARAMS = ["--class", "org.apache.spark.examples.SparkPi"]
class TestDatabricksOperatorSharedFunctions(unittest.TestCase):
    def test_deep_string_coerce(self):
        test_json = {
            'test_int': 1,
            'test_float': 1.0,
            'test_dict': {'key': 'value'},
            'test_list': [1, 1.0, 'a', 'b'],
            'test_tuple': (1, 1.0, 'a', 'b'),
        }
        expected = {
            'test_int': '1',
            'test_float': '1.0',
            'test_dict': {'key': 'value'},
            'test_list': ['1', '1.0', 'a', 'b'],
            'test_tuple': ['1', '1.0', 'a', 'b'],
        }
        assert databricks_operator._deep_string_coerce(test_json) == expected
class TestDatabricksSubmitRunOperator(unittest.TestCase):