fix bug. change deploy_tar to deploy-tar

[zt-9]

according to the script in the file procure/gcp/scripts/node.tpl

curl http://metadata.google.internal/computeMetadata/v1/instance/attributes/deploy-tar -H "Metadata-Flavor: Google"| base64 --decode > deploy.tar.gz

The file name should be deploy-tar instead of deploy_tar