Fix Windows setup dependency bug

The hook raises an AttributeError exception on Windows because
of recent changes in the pbr project. This fix solves the issue.

This is adapted from https://review.openstack.org/#/c/42170/

Since ryu didn't depend on pyudev, I think it no longer needs
a removal here.

Signed-off-by: Wei-Li Tang <alextwl@xinguard.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
topology: Setting highest rule priority to LLDP packets

Signed-off-by: Srini Seetharaman <srini.seetharaman@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofctl_rest: fix delete_flow_entry

Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofctl_rest: support OFPExperimenter message

this patch makes ofctl_rest enable use of OFPExperimenter message.

usage)

  URI:    /stats/experimenter/{dpid}
  method: POST

the message body is as follows:

  experimenter  Experimenter ID. (default: 0)
  exp_type      Experimenter defined type. (default:0)
  data_type     Data encoding type. 'ascii' or 'base64'. (default: 'ascii')
  data          Experimenter-defined arbitrary additional data. (default: '')

e.g.)

  curl -X POST -d '{"experimenter": 8992,
                    "exp_type": 10,
                    "data": "\x00\x00\x00\x01"}' http://localhost:8080/stats/experimenter/1

  curl -X POST -d '{"experimenter": 8992,
                    "exp_type": 10.
                    "data_type": "base64",
                    "data": "AAAAAQ=="}' http://localhost:8080/stats/experimenter/1

Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>