Regression in gwas.py in handling of info, maf, hwe and geno filters

[ofrei]

Describe the bug
gwas.py script supports filtering on INFO score, MAF, HWE and GENO.
The handling of this is done via gwas.py merge-plink or gwas.py merge-regenie modules, which apply these filters.
Currently when gwas.py generates its outpu scripts the gwsa.py merge-plink and gwas.py merge-regenie commands do not list values for the info, maf, hwe and geno filters.

I know why this happened, will submit a fix shortly.

To Reproduce
Follow the steps from gwas_demo.md.
They fail at

cat run1_plink2_cmd.sh | bash
cat run2_regenie_cmd.sh | bash