updates to vnet code and test

quickstart/101-virtual-network-manager-create-mesh/main.tf

@@ -11,9 +11,14 @@ resource "azurerm_resource_group" "rg" {
 }
 
 # Create three virtual networks
+resource "random_string" "prefix" {
+  length = 4
+  special = false
+  upper = false
+}
 
 resource "random_pet" "virtual_network_name" {
-  prefix = "vnet"
+  prefix = "vnet-${random_string.prefix.result}"
 }
 resource "azurerm_virtual_network" "vnet" {
   count = 3
@@ -88,7 +93,7 @@ resource "azurerm_policy_definition" "network_group_policy" {
             "allOf": [
               {
               "field": "Name",
-              "contains": "vnet"
+              "contains": "${random_pet.virtual_network_name.id}"
               }
             ]
           }

quickstart/101-virtual-network-manager-create-mesh/readme.md

@@ -5,6 +5,7 @@ This template deploys an Azure Virtual Network Manager instance with a connectiv
 ## Terraform resource types
 
 - [random_pet](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/pet)
+- [random_string](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/string)
 - [azurerm_resource_group](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/resource_group)
 - [azurerm_virtual_network](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/virtual_network)
 - [azurerm_subnet](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/subnet)