Failed creation of default mqtt client

[grofonn]

Describe the bug

new_default_builder function in mqtt_client_builder.py (awsiot) doesn't pass kwargs argument as expected.
It calles _builder function with kwargs as a single argument and not as a dictionary (**kwargs), which fails the creation of a mqtt client.
This seems to be the exact same problem that was reported for mqtt_connection_builder in #340 and solved in #341

Expected Behavior

Pass kwargs as a dictionary (**kwargs)

Current Behavior

Pass kwargs as a single argument

Reproduction Steps

    client = mqtt5_client_builder.new_default_builder(
        endpoint=endpoint,
        port=port,
        client_id=client_id,
        username=user,
        password=password,
        clean_session=False,
        keep_alive_secs=30,
        on_connection_interrupted=self.on_connection_interrupted,
        on_connection_resumed=self.on_connection_resumed,
        on_connection_success=self.on_connect,
        on_connection_failure=self.on_connection_failure,
        on_connection_closed=self.on_disconnect)

Possible Solution

Fix new_default_builder function' calls (pass **kwargs instead of kwargs=kwargs)

Additional Information/Context

No response

SDK version used

v2

Environment details (OS name and version, etc.)

Windows 10

[xiazhvera]

Thank you for making this issue! I have made a PR to fix the issue: #583

I will update the ticket once the fix is released.

[github-actions]

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