Merge "Add support for LetsEncrypt-managed certs"

ansible/group_vars/all.yml

ansible/inventory/all-in-one

ansible/inventory/multinode

ansible/roles/certificates/tasks/generate.yml

...roles/common/templates/cron-logrotate-letsencrypt.conf.j2

ansible/roles/haproxy-config/defaults/main.yml

...roxy-config/templates/haproxy_single_service_split.cfg.j2

ansible/roles/horizon/defaults/main.yml

ansible/roles/letsencrypt/defaults/main.yml

ansible/roles/letsencrypt/handlers/main.yml

ansible/roles/letsencrypt/tasks/check-containers.yml

ansible/roles/letsencrypt/tasks/config.yml

ansible/roles/letsencrypt/tasks/config_validate.yml

ansible/roles/letsencrypt/tasks/copy-certs.yml

ansible/roles/letsencrypt/tasks/deploy-containers.yml

ansible/roles/letsencrypt/tasks/deploy.yml

ansible/roles/letsencrypt/tasks/loadbalancer.yml

ansible/roles/letsencrypt/tasks/main.yml

ansible/roles/letsencrypt/tasks/precheck.yml

ansible/roles/letsencrypt/tasks/pull.yml