Add a feature flag to advertise v2 endpoints

config.py

@@ -189,6 +189,9 @@ class DefaultConfig(object):
   # Feature Flag: Whether users can directly login to the UI.
   FEATURE_DIRECT_LOGIN = True
 
+  # Feature Flag: Whether the v2/ endpoint is visible
+  FEATURE_ADVERTISE_V2 = True
+
   BUILD_MANAGER = ('enterprise', {})
 
   DISTRIBUTED_STORAGE_CONFIG = {