Pass Sample Names

In order to disambiguate VCF results that differ only in the sample names used as inputs, pass those names along from the commands when asking a result for its VCF result.
The LOH filter here isn't interested in the VCF results that may be generated by running these two commands (It was written before VCF results (or DV2 results)) existed, so the sample names are completely ignored by the filter (but still should match :smile:).  We don't really use this LOH filter anymore, anyway.