Add JDG indexing support to OpenShift HA Authoring in RHPAM and RHDM

Per BAPL-1003, we will either need to add configurability to choose JDG instead of ElasticSearch as the indexing provider in the existing template (preferred by KrisVerlaenen), or add a separate template for it (not preferred).

This work will come after the release of 7.1.0.GA. According to rrajasek@redhat.com, "For 7.1 to 7.2 time period, the decision was to have both ES and DG available, DG coming in post 7.1 GA".