Fix failure when unprivileged user execution of archive containing /dev/null (#253)
Fix failure when unprivileged user execution of archive containing /dev/null (#253)

See discussion in https://github.com/RedHatInsights/falafel/issues/134

PaulWay/insights-core,wcmitchell/insights-core,wcmitchell/insights-core,PaulWay/insights-core