Also add additional steps to 'Advanced Concepts' section, on how
to configure `fixed` hostname SPI provider
Also address the issue pointed out during the review by Matthew.
Thanks, Matthew!
Signed-off-by: Jan Lieskovsky <jlieskov@redhat.com>
documentation section updates:
* Add details on how to pull images from Red Hat Terms Based Registry (registry.redhat.io),
* Update list of RH-SSO templates to the latest one, templates tag to the latest 'v.1.4.16'
one, and RH-SSO 7.2 images tag to the latest '1.2' one
Signed-off-by: Jan Lieskovsky <jlieskov@redhat.com>