Updated openstack/openstack
Project: openstack/neutron  f1c711d753cf024beaa0f2262a80d58004698e45

Use stop() method on MessageHandlingServer

MessageHandlingServer has no kill() method. In case neutron server using
rpc workers and is stopped, wrong method is called.

Change-Id: Id4a11f3dca070e684fb9e079139ac09792bc7aad
Closes-Bug: 1387053