AppContext initialisation fails for subscription-only access key

[tKe]

The spring AppContext fails to initialize when configured for a subscription client using an access key that does not have Send access on the topic.

With the change to the TopicClient from @Scope("prototype"), the TopicClient is eagerly created, even if it is not autowired in to any beans. As such, a MessageSender is created to support the TopicClient, which results in

AuthorizationFailedException: Unauthorized access. 'Send' claim(s) are required to perform this operation.

We're having to stick with 0.1.5 until this is resolved.