Using Node Problem Detector, Draino and AutoScaler to support
auto healing for K8s cluster, user can use a new label
"auto_healing_enabled' to turn on/off it.
Meanwhile, a new label "auto_scaling_enabled" is also introduced
to enable the capability to let the k8s cluster auto scale based
its workload.
Task: 28923
Story: 2004782
Change-Id: I25af2a72a7a960205929374d2300bd83d4d20960