Fix case where Recursively calling the same method causes StackOverFlow

[BaekSeungYeol]

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Existing code was calling the same method over and over again. and it causes StackOverFlow.

[cook-coder]

Nice try, bro. I found this bug, too.

[shurkanTwo]

When will this PR be merged? We are facing this issue and therefore can not use the paho mqtt v5 client.

[cseewald]

If you do not want to use a snapshot release to get the fix for this bug, you can also use
org.eclipse.paho.mqttv5.client.MqttClient#subscribe(org.eclipse.paho.mqttv5.common.MqttSubscription[], org.eclipse.paho.mqttv5.client.IMqttMessageListener[]) instead