Trove - IP Address Not Returned in Get Command If Addresses is Dynamic

[Auston McReynolds]

When asking for the status of a Trove deployment:

$ trove-cli instance get --id bf39fa53-58eb-439d-bd33-f631c512a412

```
{
    "created": "2013-06-25T21:52:41",
    "flavor": {
        "id": 6,
        "links": [
            {
                "href": "https://REDACTED:8779/v1.0/89f6c273df2142e8abf4fcd36df3cbdf/flavors/6",
                "rel": "self"
            },
            {
                "href": "https://REDACTED:8779/flavors/6",
                "rel": "bookmark"
            }
        ]
    },
    "id": "bf39fa53-58eb-439d-bd33-f631c512a412",
    "links": [
        {
            "href": "https://REDACTED:8779/v1.0/89f6c273df2142e8abf4fcd36df3cbdf/instances/bf39fa53-58eb-439d-bd33-f631c512a412",
            "rel": "self"
        },
        {
            "href": "https://REDACTED:8779/instances/bf39fa53-58eb-439d-bd33-f631c512a412",
            "rel": "bookmark"
        }
    ],
    "name": "DBaaSBox",
    "status": "ACTIVE",
    "updated": "2013-06-25T21:52:44",
    "volume": {
        "size": 5,
        "used": 0.23715972900390625
    }
}
```

It shows as ACTIVE, but the response does not contain an IP (the lack of a hostname is to be expected in this situation because `CONF.trove_dns_support` is set to False).

Relevant: https://github.com/openstack/trove/blob/7ab80b554dde5f1f1e61b6a8c45492c5ac27ed6b/trove/instance/views.py#L93

I have `CONF.add_addresses` set to True, so that's not the issue. The issue is that the addresses frag returned from Nova is not what Trove is expecting.

The "trove-cli instance get" command at some point executes the equivalent of a "nova show":

$ curl -i http://REDACTED:8774/v2/89f6c273df2142e8abf4fcd36df3cbdf/servers/a665572b-b5a4-4320-a0ce-fe8c596f6431 -X GET -H "X-Auth-Project-Id: trove" -H "User-Agent: python-novaclient" -H "Accept: application/json" -H "X-Auth-Token: REDACTED"

Which results in the following (snippet):

```
{
   "server":{
      "status":"ACTIVE",
      "updated":"2013-06-25T21:53:39Z",
      "hostId":"REDACTED",
      "OS-EXT-SRV-ATTR:host":"REDACTED",
      "addresses":{
         "foo-bar-net-REDACTED_IP_ADDRESS-0_24":[
            {
               "version":4,
               "addr":"REDACTED_IP_ADDRESS"
            }
         ]
      },
```

Example:

"addresses":{
  "globo-corp-net-10-99-99-99-0_24":[
    {
      "version":4,
      "addr":"10.99.99.99"
    }
  ]
},

Unfortunately, the Trove function is specifically looking for "private" or "usernet" under "addresses": https://github.com/openstack/trove/blob/7ab80b554dde5f1f1e61b6a8c45492c5ac27ed6b/trove/instance/views.py#L29

Given that the address name will be dynamic, a CONF property like nova_address_prefix (or mask) is needed.