HTTP status 300 should be supported in pagination

[rootfs]

we hit this issue in kubernetes in this line

The api response is

# curl -i  -w %{http_code}  http://xxx:8776/
HTTP/1.1 300 Multiple Choices
Content-Type: application/json
Content-Length: 1371
Openstack-Api-Version: volume 3.0
Vary: OpenStack-API-Version
Date: Wed, 14 Jun 2017 19:28:15 GMT

{
    "versions": [
        {
            "status": "SUPPORTED",
            "updated": "2014-06-28T12:20:21Z",
            "links": [
                {
                    "href": "http://docs.openstack.org/",
                    "type": "text/html",
                    "rel": "describedby"
                },
                {
                    "href": "http://xxx:8776/v1/",
                    "rel": "self"
                }
            ],
            "min_version": "",
            "version": "",
            "media-types": [
                {
                    "base": "application/json",
                    "type": "application/vnd.openstack.volume+json;version=1"
                },
                {
                    "base": "application/xml",
                    "type": "application/vnd.openstack.volume+xml;version=1"
                }
            ],
            "id": "v1.0"
        },
        {
            "status": "SUPPORTED",
            "updated": "2014-06-28T12:20:21Z",
            "links": [
                {
                    "href": "http://docs.openstack.org/",
                    "type": "text/html",
                    "rel": "describedby"
                },
                {
                    "href": "http://xxx:8776/v2/",
                    "rel": "self"
                }
            ],
            "min_version": "",
            "version": "",
            "media-types": [
                {
                    "base": "application/json",
                    "type": "application/vnd.openstack.volume+json;version=1"
                },
                {
                    "base": "application/xml",
                    "type": "application/vnd.openstack.volume+xml;version=1"
                }
            ],
            "id": "v2.0"
        },
        {
            "status": "CURRENT",
            "updated": "2016-02-08T12:20:21Z",
            "links": [
                {
                    "href": "http://docs.openstack.org/",
                    "type": "text/html",
                    "rel": "describedby"
                },
                {
                    "href": "http://xxx:8776/v3/",
                    "rel": "self"
                }
            ],
            "min_version": "3.0",
            "version": "3.0",
            "media-types": [
                {
                    "base": "application/json",
                    "type": "application/vnd.openstack.volume+json;version=1"
                },
                {
                    "base": "application/xml",
                    "type": "application/vnd.openstack.volume+xml;version=1"
                }
            ],
            "id": "v3.0"
        }
    ]
}300

According to https://developer.openstack.org/api-guide/compute/versions.html, HTTP status 300 could return when blockstorage list API versions.

[jrperritt]

closed by #383