'Revert a server back to its original flavor.
For a full list of available parameters, please refer to the official
API reference:
https://developer.openstack.org/api-ref/compute/#revert-resized-server-revertresize-action'

def revert_resize_server(self, server_id, **kwargs):

    return self.action(server_id, 'revertResize', **kwargs)
