core: tcp - log message on message processing timeout made debug

(cherry picked from commit 2af2c80fde4e82614846af9d817ab2bffa2d954d)

src/core/tcp_main.c

@@ -5575,9 +5575,9 @@ void tcp_timer_check_connections(unsigned int ticks, void *param)
 		if(n > 0) {
 			for(i = 0; i < n; i++) {
 				if((con = tcpconn_get(tcpidlist[i], 0, 0, 0, 0))) {
-					LM_CRIT("message processing timeout on connection id: %d "
-							"(state: %d) - "
-							"closing\n",
+					LM_DBG("message processing timeout on connection id: %d "
+						   "(state: %d) - "
+						   "closing\n",
 							tcpidlist[i], con->state);
 					mcmd[0] = (long)con;
 					mcmd[1] = CONN_EOF;