[Findit] Bailing out if build data is too old and moving relevant settings to config

appengine/findit/model/wf_config.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Findit for Waterfall configuration."""
 
 from google.appengine.ext import ndb
 
 from model.versioned_config import VersionedConfig
 
@@ skipping 53 matching lines @@
   #     'server_host': 'chromium-swarm.appspot.com',
   #     'default_request_priority': 150,
   #     'request_expiration_hours': 20,
   #     'server_query_interval_seconds': 60,
   #     'task_timeout_hours': 23,
   #     'isolated_server': 'https://isolateserver.appspot.com',
   #     'isolated_storage_url': 'isolateserver.storage.googleapis.com',
   #     'iterations_to_rerun': 10
   # }
   swarming_settings = ndb.JsonProperty(indexed=False, default={})
+
+  # A dict containing build data download settings. For example,
+  # {
+  #     'download_interval_seconds': 10,
+  #     'memcache_download_expiration_seconds': 3600,
+  #     'use_chrome_build_extract': True
+  # }
+  download_build_data_settings = ndb.JsonProperty(indexed=False, default={})
+