calling setActionCallback on token returned by MqtttAsyncClient.connect is ineffective

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- [ X ] Bug exists Release Version 1.2.5 ( Master Branch)
- [ ] Bug exists in MQTTv3 Client on Snapshot Version 1.2.6-SNAPSHOT (Develop Branch)
- [ ] Bug exists in MQTTv5 Client on Snapshot Version 1.2.6-SNAPSHOT (Develop Branch)

**sample pom.xml**
```sh

org.eclipse.paho
org.eclipse.paho.mqttv5.client
1.2.5

```

**sample code**
```java
token = mqttClient.connect(getOptions()
MemoryPersistence persistence = new MemoryPersistence();
mqttClient = new MqttAsyncClient(broker, clientId, persistence);
IMqttToken token = mqttClient.connect(getOptions(), null, null);
token.setActionCallback(listener)
```
**expected result:** is listener.onSuccess is called when connection is complete

**actual result :** no call is perrormed.

_note using :_
```java
IMqttToken token = mqttClient.connect(getOptions(), null, listener);
```
will result in listener.onSuccess being called.

**see also :** code comment from IMqttToken :

```java
/**
* Register a listener to be notified when an action completes.
*

Once a listener is registered it will be invoked when the action the token
* is associated with either succeeds or fails.
*

* @param listener to be invoked once the action completes
*/
public void setActionCallback(MqttActionListener listener);
```

Start with MqttAsyncClient.connect and the IMqttToken.setActionCallback contract, then reproduce the sample using MqttAsyncClient.connect(getOptions(), null, null). Compare it with passing the listener directly to connect; done means the token callback is invoked on successful completion as the interface documentation describes.

Written by the indexing model from the issue text.