message: Modify logging which is specific to ParameterServerStrategy.
diff: @@ -299,8 +299,9 @@ class ParameterServerStrategyExtended(distribute_lib.StrategyExtendedV1):
  self._task_id = None
  logging.info(
  - "ParameterServerStrategy with compute_devices = %r, "
  - "variable_device = %r", compute_devices, self._variable_device)
  + "ParameterServerStrategy (CentralStorageStrategy if you are using a "
  + "single machine) with compute_devices = %r, variable_device = %r",
  + compute_devices, self._variable_device)
  def _validate_colocate_with_variable(self, colocate_with_variable):
  values.validate_colocate(colocate_with_variable, self)
  