- What is the nature and description of the request? 
As an developer I require the ability to not have my application scale untilafter it is ready

- Why does the customer need this? (List the business requirements here) 
They need to be able to deploy all components of an application (imagestream, service, DC/RC, HPA, etc.) at once and not have the HPA try to scale everything upbefore the application is ready.

- How would the customer like to achieve this? (List the functional requirements here) 
Have the HPA catch on the Readiness Probe of the Pod

- For each functional requirement listed, specify how Red Hat and the customer can test to confirm the requirement is successfully implemented.
Deploy an app with a readiness probe and HPA and have it not scale till after the app is stable.

- Is there already an existing RFE upstream or in Red Hat Bugzilla?
Yes:
https://github.com/kubernetes/kubernetes/pull/33593

It is already supposed to be a thing in 3.4:
https://github.com/openshift/ose/blob/enterprise-3.4/vendor/k8s.io/kubernetes/pkg/controller/podautoscaler/metrics/metrics_client.go#L126

But is not in 3.3:
https://github.com/openshift/ose/blob/v3.3.1.4/vendor/k8s.io/kubernetes/pkg/controller/podautoscaler/metrics/metrics_client.go#L125