fix(p2p/liveness): remove fallible unwrap
Description
Removed stray unwrap in liveness service
Motivation and Context
Caused a base node to panic in stress test conditions.
```
thread 'tokio-runtime-worker' panicked at 'called `Result::unwrap()` on an `Err` value: DhtOutboundError(RequesterReplyChannelClosed)', base_layer\p2p\src\services\liveness\service.rs:164:71
```
How Has This Been Tested?
Tests pass
@@ -161,7 +161,7 @@ where
match ping_pong_msg.kind().ok_or(LivenessError::InvalidPingPongType)? {
PingPong::Ping => {
self.state.inc_pings_received();
- self.send_pong(ping_pong_msg.nonce, public_key).await.unwrap();
+ self.send_pong(ping_pong_msg.nonce, public_key).await?;
self.state.inc_pongs_sent();
debug!(
