vagrant: don't keep input artifact
vagrant: don't keep input artifact

catsby/golang-base,ImpressCMS/packer-impresscms-devbox,Ecodev/atlas-packer-vagrant-ubuntu14,wzur/vagrant-boxes-ubuntu,NuCivic/packer-dev-vm,virajs/atlas-packer-vagrant-tutorial,zjiang91/tenentvm,ifosch/atlas-packer-vagrant-tutorial,hashicorp/atlas-packer-vagrant-tutorial,recamshak/dev-box,catsby/golang-base,ajlanghorn/vagrant-ubuntu-cis-level1,toff63/consul-packer-atlas-box,otwcode/ao3_vagrant,kedazo/ubuntu1604_packer_template,ianunruh/packer-vagrant-ubuntu,Aetheros/devkitarm-packer,austerus/vm_atlas_build,celebdor/packer_ost_midonet,ivankristianto/devstack-packer,tcnksm/vagrant-box-golang,otwcode/ao3_vagrant,xhawk/2sasiproto64,xhawk/2sasidev,ckelner/atlas-packer-example,austerus/atlas-packer-vagrant-tutorial,ImpressCMS/packer-impresscms-devbox,bravepickle/docktor-master-test,ImpressCMS/packer-impresscms-devbox,leapcode/packer_vagrant,york-cs-dams/box,a-h/atlas-oracle-linux-for-vagrant,automatelife/atlas-packer-vagrant-tutorial