Update keycloak scenario to show case variable expansion

Bump up to 4.0.8

Set permissions on certs

Set permissions to files in /etc/rabbitmq

Use /etc/rabbitmq for configuration

Remove commented line

Use a better sentence to identify when rabbitmq has started

Add debug to make start-keycloak

Change sentence that indicates rabitmq is up

Fix bug in script

Fix urls

Add idp-initiated with portal example

Fix list of conf files

Configure keycloak+uaa+oauth2-proxy with tls

Use 4.0.2 docker image