As an admin I want Jira Data Center to expose a health check which fails if no indexes are available on the node

Problem Definition

It is not desirable to have users accessing a node with corrupt or missing indexes, since any operations that rely on searches will not provide accurate results. Jira should expose a health check to allow for the load balancer to remove such nodes from rotation.

Suggested Solution

The existing /status endpoint could return an error if indexes are missing or corrupt. This would allow the load balancer to know this node is not healthy and remove it from rotation.