Knob extractor spark props

[JoschD]

This fixes

15:43:43 - omc3.knob_extractor STDERR: Traceback (most recent call last):
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_acc_py/base/2021.12/lib/python3.9/runpy.py", line 197, in _run_module_as_main
15:43:43 - omc3.knob_extractor STDERR:     return _run_code(code, main_globals, None,
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_acc_py/base/2021.12/lib/python3.9/runpy.py", line 87, in _run_code
15:43:43 - omc3.knob_extractor STDERR:     exec(code, run_globals)
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_python3/lib/python3.9/site-packages/omc3/knob_extractor.py", line 633, in <module>
15:43:43 - omc3.knob_extractor STDERR:     main()
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_python3/lib/python3.9/site-packages/generic_parser/entrypoint_parser.py", line 451, in wrapper
15:43:43 - omc3.knob_extractor STDERR:     return func(self.parse(*args, **kwargs))
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_python3/lib/python3.9/site-packages/omc3/knob_extractor.py", line 286, in main
15:43:43 - omc3.knob_extractor STDERR:     ldb = pytimber.LoggingDB(source="nxcals", loglevel=logging.ERROR, 
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_python3/lib/python3.9/site-packages/pytimber/pytimber.py", line 1017, in __init__
15:43:43 - omc3.knob_extractor STDERR:     super().__init__(
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_python3/lib/python3.9/site-packages/pytimber/pytimber.py", line 108, in __init__
15:43:43 - omc3.knob_extractor STDERR:     self._spark = spark_session or _get_spark_session(
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_python3/lib/python3.9/site-packages/pytimber/spark_session_utils.py", line 34, in _get_spark_session
15:43:43 - omc3.knob_extractor STDERR:     maybe_spark_session = try_to_get_or_create(*args, **kwargs)
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_python3/lib/python3.9/site-packages/pytimber/spark_session_utils.py", line 30, in try_to_get_or_create
15:43:43 - omc3.knob_extractor STDERR:     return _get_or_create(flavor=flavor, *args, **kwargs)
15:43:43 - omc3.knob_extractor STDERR:   File "/afs/cern.ch/eng/sl/lintrack/omc_python3/lib/python3.9/site-packages/nxcals/spark_session_builder/__init__.py", line 189, in get_or_create
15:43:43 - omc3.knob_extractor STDERR:     for key, value in conf.items():
15:43:43 - omc3.knob_extractor STDERR: AttributeError: 'set' object has no attribute 'items'

[codeclimate]

Code Climate has analyzed commit 0eec467 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 86.0% (0.0% change).

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[fsoubelet]

Huh, I had not caught this either in the previous PR.