message: Change the default ps_ops to STANDARD_PS_OPS
diff: @@ -179,8 +179,7 @@ def replica_device_setter(ps_tasks=0, ps_device="/job:ps",
  than overriding them.
  cluster: `ClusterDef` proto or `ClusterSpec`.
  ps_ops: List of strings representing `Operation` types that need to be
  - placed on `ps` devices. If `None`, defaults to
  - `["Variable", "VariableV2", "VarHandleOp"]`.
  + placed on `ps` devices. If `None`, defaults to `STANDARD_PS_OPS`.
  ps_strategy: A callable invoked for every ps `Operation` (i.e. matched by
  `ps_ops`), that takes the `Operation` and returns the ps task index to
  use. If `None`, defaults to a round-robin strategy across all `ps`
  @@ -210,7 +209,7 @@ def replica_device_setter(ps_tasks=0, ps_device="/job:ps",
  if ps_ops is None:
  # TODO(sherrym): Variables in the LOCAL_VARIABLES collection should not be
  # placed in the parameter server.
  - ps_ops = ["Variable", "VariableV2", "VarHandleOp"]
  + ps_ops = list(STANDARD_PS_OPS)
  if not merge_devices:
  logging.warning(
  