Correctly detect Ubuntu with Linux Mint. Fixes chapmanb/bcbio-nextgen#964
Correctly detect Ubuntu with Linux Mint. Fixes chapmanb/bcbio-nextgen#964

elkingtonmcb/cloudbiolinux,rchekaluk/cloudbiolinux,AICIDNN/cloudbiolinux,joemphilips/cloudbiolinux,chapmanb/cloudbiolinux,rchekaluk/cloudbiolinux,heuermh/cloudbiolinux,chapmanb/cloudbiolinux,joemphilips/cloudbiolinux,rchekaluk/cloudbiolinux,heuermh/cloudbiolinux,pjotrp/cloudbiolinux,pjotrp/cloudbiolinux,heuermh/cloudbiolinux,chapmanb/cloudbiolinux,AICIDNN/cloudbiolinux,AICIDNN/cloudbiolinux,joemphilips/cloudbiolinux,chapmanb/cloudbiolinux,rchekaluk/cloudbiolinux,AICIDNN/cloudbiolinux,elkingtonmcb/cloudbiolinux,joemphilips/cloudbiolinux,pjotrp/cloudbiolinux,heuermh/cloudbiolinux,elkingtonmcb/cloudbiolinux,elkingtonmcb/cloudbiolinux,pjotrp/cloudbiolinux