Last operation request for Elasticsearch instances returns error on gp3 upgrade

[markdboyd]

Issue

When upgrading Elasticsearch service instances from gp2 to gp3 volume types, checking the operation status using cf service <service-name> returns "error: operation failed", even when the upgrade succeeds in AWS.

This may be a larger problem with the broker logic for Elasticsearch instances which isn't specific to gp2 -> gp3 upgrades.

To do

• Create test instance in dev space. Manually downgrade it to gp2 in AWS and the broker database
• Use cf update-service -c '{"volume_type": "gp3"} to update to gp3 volumes
• Use broker logs to determine why last operation is returning an "error"