Set nova neutron auth back to 'v3password'.
Set nova neutron auth back to 'v3password'.

Puppet-nova recently changed the default neutron auth setting
in I3416ae594e972e40ff0336779258a887987e46b1 to 'password'.

This single setting seems to break the tripleo upgrades job.

Setting it here manually for now and following up in puppet-nova.

Closes-bug: #1580076

Change-Id: I3f38a3e1ef3378a272a51ecbc1e8a801c8d3608a

dprince/tripleo-heat-templates,trozet/opnfv-tht,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,trozet/opnfv-tht,trozet/opnfv-tht