When starting an imaged environment, the SSH keys on the host do
not match the SSH keys in the containers. In this patch we ensure
that if the 'all_containers' group is present, then the deploy-vms
playbook will wait for them to come up and copy the new keys into
them. It also adds the new public key into the authorized_keys.
This ensures that the whole environment is ready to be used just
as it was before imaging.
We also remove the 'port' argument given to the wait_for_connection
module because the argument is invalid.
Change-Id: Iff0a3327c2031e0dd977e8e403b417e495fee14f
33d22c552e