TMB Tool Bug Fix

[Rima-Waleed]

• Issue 1: Samples marked WXS/WGS in the gene panel matrix file but do not exist in the sequenced case list -> TMB = 0.0 (should be NA)
• Issue 2: Gene panel matrix file has value "NA" for panel ID -> KeyError

Fixes:

• "NA" is an accepted value in the gene panel matrix file
• Samples that exist in sequenced case list and have an "NA" in the gene panel matrix file will have TMB computed
• Samples in the gene panel matrix file with any value (WXS/WGS) but not present in the sequenced case list are not sequenced and so get "NA" for TMB instead of 0