More helpful configuration message

[krisajenkins]

One error that can come up when configuring an Application is this:

raise ValueError("Either broker address or Quix SDK Token must be provided")

A very easy way to make this more useful would be to tell me what code you're actually looking for:

raise ValueError("Either `broker_address` or `quix_sdk_token` must be provided")

Same meaning, but it makes my next step crystal clear.