Mark Lucene, Elasticsearch REST client, GSON as unsupported modules

WFLY-16874 switches those modules from private to public so they can be used together with Hibernate Search, but due to our lack of control over the backwards compatibility of Lucene, GSON and Elasticsearch APIs, they cannot be supported in EAP.

So we'll have to mark the modules with "jboss.api"="unsupported" in EAP.