Rename zcall QC sim file, and ensure it is generated after sample filtering (if any)
Get test genotyping.db from GENOTYPE_TEST_DATA directory
Merge pull request #189 from iainrb/devel

Fixes to Ruby workflow tests
Bugfix; use GENOTYPE_TEST_DATA to get test DB location
Merge pull request #193 from iainrb/devel

Bugfix in simtools Ruby test