Add support for resolve-subnet-mask field in Subnetwork resource (GoogleCloudPlatform#15632)

Author: knparikh

mmv1/products/compute/Subnetwork.yaml

@@ -118,6 +118,12 @@ examples:
     vars:
       subnetwork_name: 'subnet-purpose-test-subnetwork'
       network_name: 'subnet-purpose-test-network'
+  - name: 'subnetwork_resolve_subnet_mask'
+    primary_resource_id: 'subnetwork-resolve-subnet-mask'
+    min_version: 'beta'
+    vars:
+      subnetwork_name: 'subnet-resolve-subnet-mask-test-subnetwork'
+      network_name: 'subnet-resolve-subnet-mask-test-network'
   - name: 'subnetwork_cidr_overlap'
     primary_resource_id: 'subnetwork-cidr-overlap'
     min_version: 'beta'
@@ -562,3 +568,12 @@ properties:
           To apply tags to an existing resource, see the google_tags_tag_binding resource.
         ignore_read: true
         immutable: true
+  - name: 'resolveSubnetMask'
+    type: Enum
+    description: |
+      'Configures subnet mask resolution for this subnetwork.'
+    enum_values:
+      - 'ARP_ALL_RANGES'
+      - 'ARP_PRIMARY_RANGE'
+    min_version: beta
+    immutable: true

mmv1/templates/terraform/examples/subnetwork_resolve_subnet_mask.tf.tmpl

@@ -0,0 +1,18 @@
+resource "google_compute_subnetwork" "subnetwork-resolve-subnet-mask" {
+  provider         = google-beta
+
+  name             = "{{index $.Vars "subnetwork_name"}}"
+  region           = "us-west2"
+  ip_cidr_range    = "10.10.0.0/24"
+  purpose          = "PRIVATE"
+  resolve_subnet_mask = "ARP_PRIMARY_RANGE"
+  network          = google_compute_network.custom-test.id
+}
+
+resource "google_compute_network" "custom-test" {
+  provider                = google-beta
+
+  name                    = "{{index $.Vars "network_name"}}"
+  auto_create_subnetworks = false
+}
+