Mqtt5 Adapter Binding

[xiazhvera]

Issue #, if available:

Description of changes:

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[bretambrose]

I wish these were not public and instead there was a constructor in MqttConnection that took a 5 client and used package-private functionality to construct the config and make the native call.

[xiazhvera]

Added a constructor in MqttConnection. However, as MqttConnection and Mqtt5Client is not in the same package, it is not possible to use a package-private config, instead I add a getClientOptions for Mqtt5Client so that the MqttConnection could access the config.

[xiazhvera]

Also, after thinking about it. This is a better workflow as it reduced the chance that the Mqtt5Client user to access the Mqtt3 interface. I will also update it for CPP and Python.