Added rest_qos module

This module is intended for operation in a pipeline on a flow table.
It supports setting of the queue, (Currently, only support
OpenvSwitch), packet marking, queuing, regitation to meter table,
perform this simple QoS.

Signed-off-by: Kiyonari Harigae <lakshmi@cloudysunny14.org>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>