Document EAP Azure template offering in Azure Marketplace

Purpose of this Jira is to provide note about EAP Azure template offering on Azure Marketplace and link related documentation from our documentation. There should be mentioned that such offering exists and provide link to following article:

https://docs.microsoft.com/en-us/azure/virtual-machines/workloads/redhat/jboss-eap-marketplace-image - this is major document how to deploy EAP on Azure using Azure templates

Optionally (not related just to this offering) link:
https://docs.microsoft.com/en-us/azure/virtual-machines/workloads/redhat/jboss-eap-on-azure-best-practices - this document is not tight to EAP Azure template offering and provide best practices for use of EAP on Azure