message: Fix new_era() arguments mix-up.
diff: @@ -886,8 +886,8 @@ where
  Timestamp::now(), // TODO: This should be passed in.
  next_era_validators_weights.clone(),
  newly_slashed,
  - era_end.inactive_validators.iter().cloned().collect(),
  slashed,
  + era_end.inactive_validators.iter().cloned().collect(),
  seed,
  switch_block_header.timestamp(),
  switch_block_header.height() + 1,
  