Add configVersion to DM_CONFIG_KEYS
Add configVersion to DM_CONFIG_KEYS

References:
- https://github.com/GoogleCloudPlatform/deploymentmanager-samples/blob/master/google/resource-snippets/cloudkms-v1/kms.yaml
- https://github.com/GoogleCloudPlatform/deploymentmanager-samples/issues/127
- https://github.com/GoogleCloudPlatform/deploymentmanager-samples/issues/169
GoogleCloudPlatform/cloud-foundation-toolkit,GoogleCloudPlatform/cloud-foundation-toolkit,GoogleCloudPlatform/cloud-foundation-toolkit,GoogleCloudPlatform/cloud-foundation-toolkit,GoogleCloudPlatform/cloud-foundation-toolkit