fix tests on windows
fix tests on windows

rnaveiras/packer,dave2/packer,paulmey/packer,rnaveiras/packer,bryson/packer,timsutton/packer,mitchellh/packer,paulmey/packer,paulmey/packer,ricardclau/packer,dave2/packer,timsutton/packer,mitchellh/packer,bryson/packer,hashicorp/packer,dave2/packer,tas50/packer,ricardclau/packer,pecigonzalo/packer,paulmey/packer,hashicorp/packer,paulmey/packer,timsutton/packer,mitchellh/packer,ricardclau/packer,hashicorp/packer,pecigonzalo/packer,tas50/packer,grubernaut/packer,bryson/packer,pecigonzalo/packer,mitchellh/packer,ricardclau/packer,dave2/packer,bryson/packer,timsutton/packer,bryson/packer,dave2/packer,bryson/packer,mitchellh/packer,rnaveiras/packer,grubernaut/packer,tas50/packer,rnaveiras/packer,rnaveiras/packer,pecigonzalo/packer,tas50/packer,grubernaut/packer,rnaveiras/packer,ricardclau/packer,timsutton/packer,grubernaut/packer,tas50/packer,dave2/packer,grubernaut/packer,ricardclau/packer,timsutton/packer,hashicorp/packer,paulmey/packer,grubernaut/packer,tas50/packer