Bugfix when reading mapping table in lai lulc workflow

[shartgring]

Issue addressed

Fixes #289

Explanation

An error was raised because the columns 1 to 12 could not be found. This is caused by reading them as a string. This is solved by checking if there are digit columns and converting them to integers. This has been tested with a Wflow model for which a mapping table was created with setup_lulcmaps, and which is read by setup_laimaps_from_lulc_mapping in lai_mapping_fn.

Checklist

• Updated tests or added new tests
• Branch is up to date with main
• Tests & pre-commit hooks pass
• Updated documentation if needed

Additional Notes (optional)

Add any additional notes or information that may be helpful.

[shartgring]

First test failed as it now had trouble reading integer columns! Not anymore now

I tried to keep it a simple bugfix, hence converting it to string to do .isdigit(). It covers now both int and str columns. Don't think we need more support within this workflow?

[hboisgon]

LGTM, thanks for fixing it @shartgring !