DM/PAM 7.4 is aligning to RHDG 7.3

Determine what is required to document section 2.1. "Installing and configuring RHDG" and implement for the DM/PAM 7.4 release.

Doc Links:
DM 7.3
PAM 7.3

Assess impact of:
BAPL-1003
BAPL-1080

Draft TOC (DM):
1. Red Hat Decision Manager clusters
2. Red Hat Decision Manager clusters in a development (authoring) environment
2.1. Installing and configuring RHDG
2.2. Downloading and configuring AMQ Broker
2.3. Downloading and extracting Red Hat JBoss EAP 7.2 and Red Hat Decision Manager
2.4. Configuring and running Decision Central in a cluster
2.5. Verifying the Red Hat Decision Manager cluster
3. Decision Server clusters in a runtime environment
3.1. Downloading and extracting Red Hat JBoss EAP 7.2 and Decision Server
3.2. Clustering with the headless Decision Manager controller
4. Additional resources
A. Versioning information
Legal Notice

SMEs:
QE: Karel Suta, Tomas David
Eng: Alexandre Porcelli, Piotr Szubiakowski, Adriel Paredes

Rough Draft Previews:
DM 7.4
PAM 7.4

Previews:

Pull Request:

Additional Links:
Clustering_setup_with_gluster_AMQ_RHDG
RHDG Integration
Business-central clustering doesn't work with RHDG
Write documentation to enable Infinispan index engine in WB