The documentation style guide recommends using example URLs for
OpenStack services that look like
`http://<service>.openstack.example.org`. This patch changes the URLs
for hypothetical keystone Service Providers to use HTTPS endpoints to
set a good example of security, to use the example.org domain instead of
localhost or example.com, to include keystone in the name for clarity of
what the service is, and to use a consistent URL path and port. It
doesn't include 'openstack' in the domain name because that becomes a
bit long.
[1] https://docs.openstack.org/doc-contrib-guide/writing-style/urls.html
Partial-bug: #1793374
Change-Id: I8e12edaa589be3c8e71b10d0609c057fd2bfb247
40e0f5d976