2864150940
Neutron has changed to use ovs native interface by default, but when the hypervisor is XenServer, we cannot use ovs native interface without extra configurations in neutron-openvswitch-agent(q-agt) in compute node. This patch is to add the needed configurations automatically during deployment, so user needn't to do it manually and restart q-agt. Change-Id: Ibc69d3cdb4d75833f2ac16840c62bcacf460dd4f