This patch enables to specify the port number and the queue id to get the queue stats.
Usage)
$ curl -X GET http://localhost:8080/stats/queue/<dpid>[/<port>[/<queue_id>]]
Note: Specification of port number and queue id are optional.
If you want to omitting the port number and setting the queue id,
please specify the keyword "ALL" to the port number.
e.g. GET /stats/queue/1/ALL/1
Signed-off-by: Shinpei Muraoka <shinpei.muraoka@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>