playbook changes for suclass.stanford.edu
Merge branch 'jbau/suclass' into rc
Merge branch 'rc' into release
Merge branch 'release'
Modernize certs installation plays

* Update the certs installation plays to install and configure the open
  source certs repo using secrets to configure useful settings.
Bugfixes for cert install recipes

* Includes reformating of stage/prod worker playbooks, to eliminate
  inconsistencies that made them difficult to compare.
Enable default CME certs deploy