Create a function for checking the NORM-VET data for issues

[hkaspersen]

Like the EFSA checks:

• Missing/incorrect operator
• Missing/incorrect dates
• Missing data fields

Other checks:

• Missing/incorrect MIC-values
• Incorrect definitions (bakterie_kategori, etc)
• Sample counts to verify number of samples

[hkaspersen]

Missing values check:
Species, Material, Conclusion code

Conclusion code: Check if the result is "Ikke påvist" and MIC values are present, and vice versa

[hkaspersen]

Cephalosporins check:
If one isolate is resistant to only one cephalosporin (cefo/cefta) of two, flag out, need saksnr on these

Carba check:
If any resistant, flag