Updated openstack/openstack
Project: openstack/neutron  8293302a2ea10805cd2d8928278fc6f514bad076
null
Fix update_device_up method of linuxbridge plugin

Also add unit tests covering update_device_up and update_device_down
methods

Change-Id: I97f2f9249b684aa5350b3f0621754543e80bec70
Closes-Bug: #1241602