HorizontalPodAutoscalerSpec
final case class HorizontalPodAutoscalerSpec(maxReplicas: Int, scaleTargetRef: CrossVersionObjectReference, minReplicas: Option[Int], metrics: Option[Seq[MetricSpec]], behavior: Option[HorizontalPodAutoscalerBehavior])
HorizontalPodAutoscalerSpec describes the desired functionality of the HorizontalPodAutoscaler.