message: Log when new era is created.
diff: @@ -335,6 +335,7 @@ where
  .consensus
  .deactivate_validator();
  let new_era_id = block_header.era_id().successor();
  + info!(?new_era_id, "Era created");
  let results = self.era_supervisor.new_era(
  new_era_id,
  Timestamp::now(), // TODO: This should be passed in.
  