Fire and forget mode

[daniel-ac-martin]

I think kd should have a 'fire and forget' mode. i.e. It should be possible to create a deployment and move on without waiting for its rollout to complete. There a two reasons for this:

1. Inter-dependent deployments - Let's say micro-service B requires micro-service A to have started before it can start. But micro-service A is not ready until micro-service B has started.

2. Deployment speed - In many cases two services will not rely on each other and so it makes no sense for us to deploy in sequence. Rather, we should deploy them in parallel. That way they can each be rolling out and the same time and reduce the overall time taken to deploy the service.