Need to check VCF for sample name if no RG tags in BAM

[adadiehl]

This will alleviate the need to use the -s option to input the sample name.

[LilyLiuX]

[LilyLiuX]

It will help by adding -s. For example, -s LIBD75

[LilyLiuX]

Using --ignore_samples will not help.