New environment file to configure containers.
New environment file to configure containers.

This is part of a larger series that changes the interface used
for configuring which containers are used.  This needs CI and
possibly quickstart updates to use this environment file so CI
will continue to pass.

Change-Id: I125137ba45f608cf84ea0a7146edd744a549d23b
Co-Authored-By: Dan Prince <62cccc0004df0a8e3c343b26b69e434f6aa9711c@redhat.com>

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