configure_port_test.go: don't panic when error is not what we expected
configure_port_test.go: don't panic when error is not what we expected

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