IoT Core cloud client migration 3/4, device CRUD (#1572)
IoT Core cloud client migration 3/4, device CRUD (#1572)

* IoT Core cloud client migration 3/4, device CRUD
GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples