Definitions export from management UI does not include vhost metadata

[lukebakken]

https://vmware.slack.com/archives/C0RDGG81Z/p1707224857559109

Reproduction steps:

Create vhost

rabbitmqctl add_vhost test --default-queue-type quorum

Export using CLI

rabbitmqctl export_definitions test-vhost-with-queue-type-from-cli.json

Note that the above file includes vhost metadata:

    "vhosts": [
        {
            "limits": [],
            "metadata": {
                "description": "Default virtual host",
                "tags": []
            },
            "name": "/"
        },
        {
            "limits": [],
            "metadata": {
                "description": "",
                "tags": [],
                "default_queue_type": "quorum"
            },
            "name": "test"
        }
    ],

Export using management UI

Note that the exported file does NOT contain metadata:

    "vhosts": [
        {
            "name": "/"
        },
        {
            "name": "test"
        }
    ],

[michaelklishin]

@lukebakken thank you for digging in and providing the details.

[lukebakken]

cc @pvladMQ