Add "neutron-server" to list of services to restart

Without first restarting the neutron-server service, restarting
the other Neutron services causes them to reference incorrect
configuration directives.

Patch now covers all supported distributions.

Closes-Bug: #1250603
Change-Id: Ice0df91256de20ce0ba90e9dbc3d195772032b9f
(cherry picked from commit b20ed281e8a25763b14ae9fbd082e46bd70414c7)