Verify server list_addresses V2/V3 APIs attributes

This patch adds the JSON schema for Nova V2 & V3 server list_addresses
APIs response and validate the response with added
JSON schema to block the backward incompatibility change in the future.

The response body of server list_addresses V2 API is below:

{
    "addresses": {
        "private": [
            {
               "version": 4,
               "addr": "192.168.0.3"
            }
        ]
    }
}

The response body of server list_addresses V3 API is below:

{
    "addresses": {
        "private": [
            {
                "version": 4,
                "addr": "192.168.0.3",
                "type": "fixed",
                "mac_addr": "aa:bb:cc:dd:ee:ff"
            }
        ]
    }
}

Partially implements blueprint nova-api-attribute-test

Change-Id: I21392dfb8141d0cf98bf2dcbcb3fd49e75f9cbd8
Merge "Verify server list_addresses V2/V3 APIs attributes"