Pass sample names for VCF lookup in DV2.
Reorder error checking so get correct message when VCF not found.
Add hardcoded sample name for filter to match the detector.
Update tests to pass sample names into commands.
Use the params we already collected.
Make fake sample name consistent with other tests.
Also pass sample names as filter VCF parameters.
Merge pull request #78 from tmooney/pass_sample_names

Pass Sample Names when looking up VCF results