Make Zone compatible with ManagedZone API resource

[ccobham]

When creating a google-cloud-dns Zone object, this library maps properties from an underlying google-api-services-dns ManagedZone response. Not all properties exposed in the REST API / google-api-services-dns library are mapped as would be expected.

I happened to need the visibility field, but at a glance there are a number of additional missing properties (serviceDirectoryConfig, reverseLookupConfig, ...).

Ideally, the google-cloud-dns Zone would expose all of the same properties available in the API or it would provide a handle to the google-api-services-dns ManagedZone.

Were these properties omitted intentionally? If so, is there a recommended way to retrieve them using this library?

Thanks!

• https://cloud.google.com/dns/docs/reference/rest/v1beta2/managedZones#ManagedZone