Guide: WildFly mini series: REST Client

[yersan]

Add 3 more guides to the Java Microservices on Kubernetes with WildFly:

1. HOW-TO invoke one microservice from another microservice
2. HOW-TO to do it on Kubernetes
3. HOW-TO to propagate security data

[yersan]

@tommaso-borgato I cannot assign this issue to you, not sure why, could you auto-assign it to yourself? this one tracks the issues under https://github.com/orgs/wildfly/projects/1

[tommaso-borgato]

@yersan I cannot assign it to myself either