'Shows capabilities for a storage back end.
For a full list of available parameters, please refer to the official
API reference:
http://developer.openstack.org/api-ref/block-storage/v2/#show-back-end-capabilities'

@removals.remove(message='use    show_backend_capabilities    from    tempest.lib.services.volume.v2.capabilities_client')
def show_backend_capabilities(self, host):

    url = ('capabilities/%s' % host)
    (resp, body) = self.get(url)
    body = json.loads(body)
    self.expected_success(200, resp.status)
    return rest_client.ResponseBody(resp, body)
