[WFLY-3886] add org.jboss.remote-naming dep to org.hornetq.ra module

Add an optional dependency to org.jboss.remote-naming to the
org.hornetq.ra to be able to create a RA that connects to a remote
hornetq-server.

JIRA: https://issues.jboss.org/browse/WFLY-3886
Merge pull request #6742 from jmesnil/WFLY-3886_org.jboss.remote-naming_optional_dependency

[WFLY-3886] add org.jboss.remote-naming dep to org.hornetq.ra module