create aligner stdout channel for the aligner not in use
create aligner stdout channel for the aligner not in use

ewels/NGI-RNAseq,ewels/NGI-RNAseq,Hammarn/NGI-RNAseq,SciLifeLab/NGI-RNAseq,Hammarn/NGI-RNAseq,ewels/NGI-RNAseq,SciLifeLab/NGI-RNAseq,SciLifeLab/NGI-RNAseq,Hammarn/NGI-RNAseq,SciLifeLab/NGI-RNAseq,SciLifeLab/NGI-RNAseq,Hammarn/NGI-RNAseq,ewels/NGI-RNAseq,Hammarn/NGI-RNAseq,ewels/NGI-RNAseq