'Deletes an existing server and waits for it to be gone.'

@classmethod
def delete_server(cls, server_id):

    try:
        cls.servers_client.delete_server(server_id)
        waiters.wait_for_server_termination(cls.servers_client, server_id)
    except Exception:
        LOG.exception('Failed    to    delete    server    %s', server_id)
