message: Eliminate cfg(test) max data in favor of set_local_tparam()
  Now that we have set_local_tparam(), it's easier to use that when we need
  specific connection values than to conditionalize const values for test.
diff: @@ -55,10 +55,7 @@ const NUM_EPOCHS: Epoch = 4;
  pub const LOCAL_STREAM_LIMIT_BIDI: u64 = 16;
  pub const LOCAL_STREAM_LIMIT_UNI: u64 = 16;
  -#[cfg(not(test))]
  const LOCAL_MAX_DATA: u64 = 0x3FFF_FFFF_FFFF_FFFE; // 2^62-1
  -#[cfg(test)]
  -const LOCAL_MAX_DATA: u64 = 0x3FFF; // 16,383
  const LOCAL_IDLE_TIMEOUT: Duration = Duration::from_secs(60); // 1 minute
  @@ -2855,19 +2852,21 @@ mod tests {
  fn max_data() {
  let mut client = default_client();
  let mut server = default_server();
  + server.set_local_tparam(
  + tp_constants::INITIAL_MAX_DATA,
  + TransportParameter::Integer(16383),
  + );
  +
  connect(&mut client, &mut server);
  let stream_id = client.stream_create(StreamType::UniDi).unwrap();
  assert_eq!(stream_id, 2);
  - assert_eq!(
  - client.stream_avail_send_space(stream_id).unwrap(),
  - LOCAL_MAX_DATA // 16383, when cfg(test)
  - );
  + assert_eq!(client.stream_avail_send_space(stream_id).unwrap(), 16383);
  assert_eq!(
  client
  .stream_send(stream_id, &[b'a'; RX_STREAM_DATA_WINDOW as usize])
  .unwrap(),
  - LOCAL_MAX_DATA as usize
  + 16383
  );
  let evts = client.events().collect::<Vec<_>>();
  assert_eq!(evts.len(), 2); // SendStreamWritable, StateChange(connected)
  