message: fix packet send order in test
diff: @@ -1855,8 +1855,8 @@ mod test {
  //
  // Trigger:
  // - send packet on each path
  - // - packet 1: 1st path: time 200
  - // - packet 0: 2nd path: time 500
  + // - packet 0: 2nd path: time 300
  + // - packet 1: 1st path: time 300
  // - send ack for both packet on 1st path
  //
  // Expectation:
  @@ -1879,33 +1879,34 @@ mod test {
  // Trigger:
  let time_sent = s2n_quic_platform::time::now() + Duration::from_secs(10);
  - let first_sent_time = time_sent + Duration::from_millis(200);
  - let second_sent_time = time_sent + Duration::from_millis(500);
  + let sent_time = time_sent + Duration::from_millis(300);
  let ack_receive_time = time_sent + Duration::from_millis(1000);
  - // send packet 1 (largest) on first path. sent + 200
  + // send packet 0 packet on second path. sent +500
  + context.set_path_id(second_path_id);
  manager.on_packet_sent(
  - space.new_packet_number(VarInt::from_u8(1)),
  + space.new_packet_number(VarInt::from_u8(0)),
  transmission::Outcome {
  ack_elicitation: AckElicitation::Eliciting,
  is_congestion_controlled: true,
  bytes_sent: packet_bytes,
  packet_number: space.new_packet_number(VarInt::from_u8(1)),
  },
  - first_sent_time,
  + sent_time,
  &mut context,
  );
  - // send packet 0 packet on second path. sent +500
  - context.set_path_id(second_path_id);
  +
  + // send packet 1 (largest) on first path. sent + 200
  + context.set_path_id(first_path_id);
  manager.on_packet_sent(
  - space.new_packet_number(VarInt::from_u8(0)),
  + space.new_packet_number(VarInt::from_u8(1)),
  transmission::Outcome {
  ack_elicitation: AckElicitation::Eliciting,
  is_congestion_controlled: true,
  bytes_sent: packet_bytes,
  packet_number: space.new_packet_number(VarInt::from_u8(1)),
  },
  - second_sent_time,
  + sent_time,
  &mut context,
  );
  assert_eq!(manager.sent_packets.iter().count(), 2);
  @@ -1934,7 +1935,7 @@ mod test {
  // assert first path
  assert_eq!(
  first_path.rtt_estimator.latest_rtt(),
  - ack_receive_time - first_sent_time
  + ack_receive_time - sent_time
  );
  assert_eq!(first_path.congestion_controller.on_rtt_update, 1);
  