Add entry_points for l2gateway, gateway device and bgp service plugins

[Ryu Ishimoto]

In setup.cfg, add the following entries:

[entry_points]
neutron.service_plugins =
  midonet_gwdevice = midonet.neutron.services.gw_device.plugin.MidonetGwDeviceServicePlugin
  midonet_l2gw = midonet.neutron.services.l2gateway.plugin.MidonetL2GatewayPlugin
  midonet_bgp =
midonet.neutron.services.bgp.plugin:MidonetBgpPlugin

[Subhendu Ghosh (subho-prp)]

Hi,I would like to work on this bug. Can you help me start with it?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/327516

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/327516
Committed: https://git.openstack.org/cgit/openstack/networking-midonet/commit/?id=efb148c7cfc49962822110c5f85fcd7c59465913
Submitter: Jenkins
Branch: master

commit efb148c7cfc49962822110c5f85fcd7c59465913
Author: hobo.kengo <email address hidden>
Date: Thu Jun 9 07:54:35 2016 +0000

    Add entry_points for l2gateway, gwdevice and bgp service plugins

    Change-Id: Idbbf4d124df0f692d9173aa444323e55b866d918
    Closes-Bug: #1580991