Feature/max retry (#409)

* Maximum number of allowed reconnection attempts

* Requiring initial internode connection to be successful

* Decreased logging level for failing to establish initial connection

mixnode/src/node/mod.rs

@@ -83,6 +83,7 @@ impl MixNode {
             self.config.get_packet_forwarding_initial_backoff(),
             self.config.get_packet_forwarding_maximum_backoff(),
             self.config.get_initial_connection_timeout(),
+            self.config.get_packet_forwarding_max_reconnections(),
         );
 
         tokio::spawn(async move { packet_forwarder.run().await });