derive_vars_suppqual function update

[statasaurus]

tester feedback regarding derive_vars_suppqual():

I can not generate the data for my own protocol dm and suppdm although I run package sample data dm without error. It is due to the fact the Oncology trial SUPPDM data we have have IDVAR and IDVARVAL populated USUBJID and its value besides variable STUDYID/DOMAIN/USUBJID. The current admiral function gives error. Suggested solution: expand function ability to not assume IDVAR and IDVARVAL empty. They could USUBJID and its values.

Can you consider this in your implementation?

[statasaurus]

Opps that is the wrong commit, but this should be resolved with the new supp functions