'Makes sure anything we created or started up in the
tests are destroyed or spun down'

def cleanup(self):

    servers = [self.api_server, self.registry_server, self.scrubber_daemon]
    for s in servers:
        try:
            s.stop()
        except Exception:
            pass
    for f in self.files_to_destroy:
        if os.path.exists(f):
            os.unlink(f)
