Nonsensical elasticsearch scale down event

[cehoffman]

Is this a BUG REPORT or FEATURE REQUEST?:

/kind bug

What happened:

Scaling down elasticsearch node pool resulted in a nonsensical event.

What you expected to happen:

The event to report the correct number of replicas in scaled down pool (0).

How to reproduce it (as minimally and precisely as possible):

Create a node pool with members, cause a scale down to 0.

Anything else we need to know?:

Environment:

• Kubernetes version (use kubectl version): 1.9.6
• Cloud provider or hardware configuration**: Azure
• Install tools: Navigator 0.1.0
• Others: