restart service properly

service binary not work properly for some services, so lets use common method for all of the services - /etc/init.d/

otherwise services will not restart with message like
[Tue, 10 Sep 2013 16:04:53 +0000] INFO: Restarting quantum-server
[Tue, 10 Sep 2013 16:04:53 +0000] INFO: Restarting quantum-plugin-openvswitch-agent
restart: Unknown instance:
[Tue, 10 Sep 2013 16:04:53 +0000] INFO: Restarting quantum-dhcp-agent
[Tue, 10 Sep 2013 16:04:53 +0000] INFO: Restarting quantum-l3-agent