Another attempt at fixing a flapping test
Another attempt at fixing a flapping test

Increased the AckWait to avoid redeliveries before the server
is restarted (which would otherwise cause this test to fail).
In the event the messages are redelivered before the server restart,
detect that situation and simply skip the test instead of failing
it.

nats-io/nats-streaming-server,nats-io/nats-streaming-server