Add project identifier line to cluster and topic samples

Author: jessdejong

managedkafka/managedkafka_create_topic/main.tf

@@ -16,6 +16,7 @@
 
 # [START managedkafka_create_topic_parent]
 resource "google_managed_kafka_cluster" "default" {
+  project    = data.google_project.default.project_id # Replace this with your project ID in quotes
   cluster_id = "my-cluster-id"
   location   = "us-central1"
   capacity_config {
@@ -47,6 +48,7 @@ resource "google_compute_network" "default" {
 
 # [START managedkafka_create_topic]
 resource "google_managed_kafka_topic" "default" {
+  project            = data.google_project.default.project_id
   topic_id           = "my-topic-id"
   cluster            = google_managed_kafka_cluster.default.cluster_id
   location           = "us-central1"