IssueTracker

Issue: This happens when you try to add or remove a forwardingConfig -> targetNameServers on an existing deployment with DeploymentManager.

The Update gives the following error:
ERROR: (gcloud.deployment-manager.deployments.update) Error in Operation [operation-1564568819271-58ef790b3069d-dd4490fb-81d7541e]: errors: - code: CONDITION_NOT_MET location: /deployments/brotator-deploy/resources/test.brotator.com->$.properties message: '"": domain: validation; keyword: properties; message: required property(ies) not found; missing: ["managedZone"]; required: ["managedZone"]'

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Original Deployment .yaml

resources:
- name: test.brotator.com 
type: gcp-types/dns-v1beta2:managedZones
properties:
description: 'DNS Forwarding zone for domain test.brotator.com'
dnsName: test.brotator.com.
name: test-brotator-com
visibility: private
privateVisibilityConfig:
networks:
- networkUrl: https://www.googleapis.com/compute/v1/projects/***/global/networks/default 
forwardingConfig:
targetNameServers:
- ipv4Address: 10.142.0.1
- ipv4Address: 10.142.0.2
- ipv4Address: 10.142.0.3

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Deployment Update .yaml

resources:
- name: test.brotator.com 
type: gcp-types/dns-v1beta2:managedZones
properties:
description: 'DNS Forwarding zone for domain test.brotator.com'
dnsName: test.brotator.com.
name: test-brotator-com
visibility: private
privateVisibilityConfig:
networks:
- networkUrl: https://www.googleapis.com/compute/v1/projects/***/global/networks/default 
forwardingConfig:
targetNameServers:
- ipv4Address: 10.142.0.1
- ipv4Address: 10.164.0.2
- ipv4Address: 10.164.0.3

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Steps to reproduce:
1. Use the "Original Deployment to create the deploy"
2. Use the "Updated Deploy" to try and update the FW zones (gcloud deployment-manager deployments update brotator-deploy --config update.yaml)
3. See the Behavior