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/openssl-tls.cpp

@@ -280,6 +280,6 @@ void run_openssl_tls_examples() {
 	publish_qos0_openssl_tls();
 	publish_qos1_openssl_tls();
 	publish_qos2_openssl_tls();
-	subscribe_and_receive_openssl_tls(2);
+	subscribe_and_receive_openssl_tls(1);
 	test_coro();
 }