Required layout for units.tsv and samples.tsv is unclear

[julia-luz]

Hello!

The required layout for those files as explained in the workflow catalog is a bit unclear, having example tables would be much appreciated. After a few failed attempts, I looked at your config files in the .test directory and used them as an example. However, in those files, you have group and sample_name simply set as "example" in a single row in both files.

Through that, it eventually became clear that having group and sample_name be different from each other within my samples.tsv file was what caused my run to fail - setting them to be the same had it working.

I'm not sure if this is actually working as intended and it's just not clear from the documentation, or if I should be able to set those as differently from each other and this is a bug.

[tedil]

This might indeed be inconsistent, I will have a look.