Fix files: for scenario003 standalone - pointing to wrong env
Fix files: for scenario003 standalone - pointing to wrong env

It was pointing to the old multinode env file instead of the new
standalone one

Change-Id: Ic093d11d717a6022b100972211d1d92b769248e6

dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates