Do not store ec=session_expired if the client never subscribed

Summary: related to T13152

Reviewers: ivica

Reviewed By: ivica

Subscribers: miljen, iljazovic

Differential Revision: https://repo.mireo.local/D26803

example/websocket-tls.cpp

@@ -245,5 +245,5 @@ void run_websocket_tls_examples() {
 	publish_qos0_websocket_tls();
 	publish_qos1_websocket_tls();
 	publish_qos2_websocket_tls();
-	subscribe_and_receive_websocket_tls(2);
+	subscribe_and_receive_websocket_tls(1);
 }