CODS updates

[mdeceglie]

Before a full release of the CODS algorithm (#150) we should address the following:

1. pd.concat causes a FutureWarning (see notebook example)
2. Rename parameters with _tuner in the name
3. Update the CODS example notebook to use PVDAQ4 data
4. Add the CODS example notebook to the CI notebook checks

[mdeceglie]

To address item 4, we may need to seed the number random generator

[kandersolar]

The progress bar text will also be a problem for item 4:
# 16 | Used: 2.2 min | Left: 0.0 min | Progress: [----------------------------->] 100 %

We could add a new "sanitization" regex in docs/nbval_sanitization_rules.cfg to deal with that. Or just remove the progress bar from the notebook (verbose=False).

[kandersolar]

I think the docstring description of the results_dict returned from iterative_signal_decomposition need some tweaks: the degradation and soiling_loss keys are described as containing lists but the actual return values are scalars.

[mdeceglie]

#333 addressed items 1 and 2 here. 3 and 4 should still be addressed before a real release.

[mdeceglie]

Items 3 and 4 added in #390