remove block dir on failure to make repo dir for new driver
remove block dir on failure to make repo dir for new driver

ShengjieLuo/pachyderm,sambooo/pachyderm,alexdebrie/pachyderm,ShengjieLuo/pachyderm,klucar/pachyderm,klucar/pachyderm,ShengjieLuo/pachyderm,sambooo/pachyderm,klucar/pachyderm,alexdebrie/pachyderm,sambooo/pachyderm,alexdebrie/pachyderm