Check if channel is enabled or active logon exchange is in progress f…

…or gracefull disconnect

src/main/java/com/exactpro/th2/FixHandler.java

@@ -2634,7 +2634,11 @@ private void disconnect(boolean graceful) throws ExecutionException, Interrupted
         resetHeartbeatTask();
         resetTestRequestTask();
         Thread.sleep(settings.getDisconnectCleanUpTimeoutMs());
-        channel.close().get();
+        if(!graceful) {
+            channel.close().get();
+        } else if(!enabled.get() && activeLogonExchange.get()) {
+            channel.close().get();
+        }
     }
 
     private void openChannelAndWaitForLogon() throws ExecutionException, InterruptedException {