OpenStackServer status reporting spurious data

[pierreprinetti]

• flavorID and imageID in status are displayed as JSON strings.
• securityGroupIDs should not be null

  status:
    addresses: '{}'
    createdAt: "2023-11-19T21:22:09Z"
    flavorID: '{"id":"889ef5ab-92c2-4701-bf82-8209da1d29f4","links":[{"href":"https://{NOVA host}/flavors/889ef5ab-92c2-4701-bf82-8209da1d29f4","rel":"bookmark"}]}'
    hostID: f42ea9d20e84f28bffa1286b50829b6753839bf0cab0a73a1ef43247
    id: b020d6af-2f1e-48a7-bc5c-90e7ad530ab9
    imageID: '{"id":"da314c41-19bf-486a-b8da-39ca51fd17de","links":[{"href":"https://{NOVA host}/images/da314c41-19bf-486a-b8da-39ca51fd17de","rel":"bookmark"}]}'
    metadata: '{}'
    name: workstation
    securityGroupIDs: "null"
    status: BUILD
    tenantID: 90dce24f8e6748bfba319a9223d0a7a6
    updatedAt: "2023-11-19T21:22:12Z"
    userID: 9cf7d432f0ed54e3c55a43984e0fe27273547537043cfdcee0857c1017d21120