fixed snapshot download and running in linux guest via windows vagrant host

Hi,
This introduces a compilation error:
error during compilation: Validation of Exec[line-endings] failed: "dos2unix /opt/nexus-script/download-artifact-from-nexus.sh' is not qualified and no path was specified. Please qualify the command or specify a path".

It should have the "path" parameter, e.g.:
  path=> '/bin:/usr/bin:/sbin'