Update Endpoints samples: (GoogleCloudPlatform#276)

* Update Endpoints samples:

1. Change default service names to the new cloud.goog format.
2. Change app.yaml beta_settings to endpoints_api_service.

Author: sepehre

endpoints/getting-started/app.yaml

@@ -1,8 +1,12 @@
 runtime: php
 env: flex
 
-beta_settings:
-  # Enable Google Cloud Endpoints API management.
-  use_endpoints_api_management: true
-  # Specify the Swagger API specification.
-  endpoints_swagger_spec_file: openapi.yaml
+endpoints_api_service:
+  # The following values are to be replaced by information from the output of
+  # 'gcloud service-management deploy openapi.yaml' command. If you have
+  # previously run the deploy command, you can list your existing configuration
+  # ids using the 'configs list' command as follows:
+  # 'gcloud service-management configs list --service=echo-api.endpoints.[PROJECT-ID].cloud.goog'
+  # where echo-api.endpoints.[PROJECT-ID].cloud.goog is your Endpoints service name.
+  name: ENDPOINTS SERVICE NAME
+  config_id: ENDPOINTS CONFIG ID

endpoints/getting-started/openapi.yaml

@@ -4,7 +4,7 @@ info:
   description: "A simple Google Cloud Endpoints API example."
   title: "Endpoints Example"
   version: "1.0.0"
-host: "YOUR-PROJECT-ID.appspot.com"
+host: "echo-api.endpoints.YOUR-PROJECT-ID.cloud.goog"
 # [END swagger]
 basePath: "/"
 consumes: