message: Update unit tests after adding `reverse()`.
diff: @@ -179,7 +179,7 @@ mod queue_entry_tests {
  let message = Message::new(sender, 1u8);
  let m1 = QueueEntry::new(Instant(1), recipient1, message);
  let m2 = QueueEntry::new(Instant(2), recipient1, message);
  - assert_eq!(m1.cmp(&m2), Ordering::Less);
  + assert_eq!(m1.cmp(&m2), Ordering::Greater);
  let m3 = QueueEntry::new(Instant(1), recipient2, message);
  assert_eq!(m1.cmp(&m3), Ordering::Less);
  }
  @@ -229,8 +229,8 @@ mod queue_tests {
  let message_a = Message::new(sender, 1u8);
  let message_b = Message::new(sender, 2u8);
  - let first = QueueEntry::new(Instant(1), recipient_a, message_a);
  - let second = QueueEntry::new(Instant(1), recipient_a, message_b);
  + let first = QueueEntry::new(Instant(1), recipient_a, message_b);
  + let second = QueueEntry::new(Instant(1), recipient_a, message_a);
  let third = QueueEntry::new(Instant(3), recipient_b, message_a);
  queue.push(first.clone());
  