Fix lock_path param for neutron-server

Sync upstream patch https://review.openstack.org/136333

Closes-bug: #1394980

Change-Id: I4c667f01e4bee9f2edecd2ea2709ecf97985874e
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Merge "Fix lock_path param for neutron-server"