Investigate connection pool reconnect when Kafka not yet available

[jfallows]

Use zilla-demos streampay with connection pool enabled to attempt to reproduce.

Steps to reproduce

1. git clone https://github.com/aklivity/zilla-demos/tree/main/streampay
2. Go to streampay/stack and edit stack.yaml file by removing , "-Pzilla.binding.kafka.client.connection.pool=false"] 3 Follow the readme to start the stack

**Expected behaviour ** Zilla starts successfully and starts receiving messages and streampay UI works

**Actual behaviour ** zilla prints

 zilla-streampay-demo-api:kafka_asyncapi_client.$composite-kafka_api.kafka_client0 [18/Jul/2024:06:31:39 +0000] BINDING_KAFKA_AUTHORIZATION_FAILED Unable to authenticate client with identity (user)

and doesn't receive any message hence streampay app doesn't work