Add default gcloud_optional_create_args to provider parent
Add default gcloud_optional_create_args to provider parent

ihmccreery/puppetlabs-gce_compute,puppetlabs/puppetlabs-gce_compute,hunner/puppetlabs-gce_compute,puppetlabs/puppetlabs-gce_compute,icg-puppet/puppetlabs-gce_compute,icg-puppet/puppetlabs-gce_compute,hunner/puppetlabs-gce_compute,ihmccreery/puppetlabs-gce_compute