Restore RabbitMQ advanced starter as it is compatible with Spring Boot 2

Author: snicoll

spring-boot-project/spring-boot-starters/README.adoc

@@ -118,6 +118,9 @@ do as they were designed before this was clarified.
 | http://orika-mapper.github.io/orika-docs/[Orika]
 | https://github.com/akihyro/orika-spring-boot-starter
 
+| https://www.rabbitmq.com/[RabbitMQ] (Advanced usage)
+| https://github.com/societe-generale/rabbitmq-advanced-spring-boot-starter
+
 | http://resteasy.jboss.org/[RESTEasy]
 | https://github.com/resteasy/resteasy-spring-boot