Make neutron-tempest-dvr-ha-multinode-full to be 2 nodes job
Make neutron-tempest-dvr-ha-multinode-full to be 2 nodes job

It was run on 3 nodes but I think there is no real need for that.
Running that on 2 nodes should be enough.

Change-Id: I12406c1f654ba9ad8eb60ffc965293ecbd5b7be5

openstack/neutron,mahak/neutron,openstack/neutron,mahak/neutron,openstack/neutron,mahak/neutron