Remove hack to start openvswitch

Updates bin/init-neutron-ovs so that it no longer tries to
startup openvswitch. This should no longer be required
because the openvswitch element is automatically pulled
in via the os-net-config element dependency.

Change-Id: Ibed45fc077756a5da6cb78494c2cdd21cda52364
Merge "Remove hack to start openvswitch"