openstack: use config only where needed
openstack: use config only where needed

youhong316/packer,tb3088/packer,mitchellh/packer,mitchellh/packer,hashicorp/packer,dave2/packer,rnaveiras/packer,hashicorp/packer,paulmey/packer,pecigonzalo/packer,tb3088/packer,ricardclau/packer,ricardclau/packer,bryson/packer,bryson/packer,mitchellh/packer,rnaveiras/packer,mkuzmin/packer,tb3088/packer,mitchellh/packer,youhong316/packer,hashicorp/packer,dave2/packer,paulmey/packer,paulmey/packer,dave2/packer,paulmey/packer,ricardclau/packer,youhong316/packer,tas50/packer,mkuzmin/packer,grubernaut/packer,tas50/packer,ricardclau/packer,tb3088/packer,ricardclau/packer,dave2/packer,timsutton/packer,timsutton/packer,rnaveiras/packer,mkuzmin/packer,youhong316/packer,tb3088/packer,tb3088/packer,tas50/packer,bryson/packer,hashicorp/packer,timsutton/packer,tas50/packer,grubernaut/packer,bryson/packer,pecigonzalo/packer,timsutton/packer,bryson/packer,ricardclau/packer,paulmey/packer,bryson/packer,grubernaut/packer,rnaveiras/packer,tas50/packer,paulmey/packer,tas50/packer,grubernaut/packer,rnaveiras/packer,timsutton/packer,grubernaut/packer,dave2/packer,dave2/packer,mitchellh/packer,grubernaut/packer,timsutton/packer,pecigonzalo/packer,pecigonzalo/packer,mkuzmin/packer,mkuzmin/packer,youhong316/packer,rnaveiras/packer,youhong316/packer,mkuzmin/packer