Remove last os.rename. Fixes #1047
Remove last os.rename. Fixes #1047

lbeltrame/bcbio-nextgen,brainstorm/bcbio-nextgen,guillermo-carrasco/bcbio-nextgen,lbeltrame/bcbio-nextgen,vladsaveliev/bcbio-nextgen,a113n/bcbio-nextgen,Cyberbio-Lab/bcbio-nextgen,Cyberbio-Lab/bcbio-nextgen,mjafin/bcbio-nextgen,lbeltrame/bcbio-nextgen,guillermo-carrasco/bcbio-nextgen,lpantano/bcbio-nextgen,brainstorm/bcbio-nextgen,a113n/bcbio-nextgen,gifford-lab/bcbio-nextgen,biocyberman/bcbio-nextgen,brainstorm/bcbio-nextgen,Cyberbio-Lab/bcbio-nextgen,a113n/bcbio-nextgen,chapmanb/bcbio-nextgen,chapmanb/bcbio-nextgen,gifford-lab/bcbio-nextgen,biocyberman/bcbio-nextgen,vladsaveliev/bcbio-nextgen,lpantano/bcbio-nextgen,biocyberman/bcbio-nextgen,vladsaveliev/bcbio-nextgen,gifford-lab/bcbio-nextgen,lpantano/bcbio-nextgen,guillermo-carrasco/bcbio-nextgen,mjafin/bcbio-nextgen,mjafin/bcbio-nextgen,chapmanb/bcbio-nextgen