Add Sample: Integration Testing (#43)

add samples for integration testing

samples/integration-testing/src/main.tf

@@ -0,0 +1,6 @@
+resource "random_uuid" "uuid" {}
+
+resource "azurerm_resource_group" "rg" {
+  name     = "rg-hello-tf-${random_uuid.uuid.result}"
+  location = var.location
+}