'Post a simple, data-less action to the OS node action endpoint
:param `Node` node:
:param str action: the action to call
:return `bool`: a boolean that indicates success'

def _post_simple_node_action(self, node, action):

    uri = '/servers/{node_id}/action'.format(node_id=node.id)
    resp = self.connection.request(uri, method='POST', data={action: None})
    return (resp.status == httplib.ACCEPTED)
