Add letsencrypt to ci-builder env

Author: mnasiadka

etc/kayobe/environments/ci-builder/stackhpc-ci.yml

@@ -17,6 +17,7 @@ kolla_enable_etcd: true
 kolla_enable_grafana: true
 kolla_enable_influxdb: true
 kolla_enable_ironic: true
+kolla_enable_letsencrypt: true
 kolla_enable_magnum: true
 kolla_enable_manila: true
 kolla_enable_mariabackup: true