fixes bug where list should have been string
fixes bug where list should have been string

NCBI-Hackathons/hackathon_v001_rnaseq,DCGenomics/hackathon_v001_rnaseq,NCBI-Hackathons/hackathon_v001_rnaseq,DCGenomics/hackathon_v001_rnaseq,NCBI-Hackathons/hackathon_v001_rnaseq,DCGenomics/hackathon_v001_rnaseq