fix create_vm_spec
fix create_vm_spec

Signed-off-by: Zak Auerbach <84a275e6a279738f2aa78daf0002615dee69cc28@pivotal.io>

cloudfoundry-incubator/bosh-aws-cpi-release,cloudfoundry-incubator/bosh-aws-cpi-release,cloudfoundry-incubator/bosh-aws-cpi-release