Server returning nothing on things such as completion errors Eclipse Che

[JPinkney]

kind: PersistentVolume
apiVersion: v1
metadata: <- Autocompletion right after :

returns

[Trace - 16:51:10] Received response 'textDocument/completion - (48)' in 1ms.
No result returned.

but should return

Result: {
    "items": [],
    "isIncomplete": false
}

Part of: eclipse-che/che#9725