Added vbox step for SSH key pair business logic.
Added vbox step for SSH key pair business logic.

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