Operators now can control whether the links of "Download OpenRC" and
"Download clouds.yaml" are displayed or not via new settings
SHOW_OPENRC_FILE and SHOW_OPENSTACK_CLOUDS_YAML.
openrc and clouds.yaml files provided by horizon now assume
the basic simple deployment and do not cover keystone authentication
like saml2, openid and so on. The default openrc and clouds.yaml
from horizon do not make sense for such environments.
Change-Id: I1407a24387c7d7bd2c20c995cebf1350f8090e72
Partial-Bug: #1795851
Akihiro Motoki