(maint) Fix fqdn on JRuby

Skip resolving fqdn with Socket.getaddrinfo when the method returns an ip instead of a valid fqdn

Author: Oana Tanasoiu

lib/facter/resolvers/hostname_resolver.rb

@@ -48,7 +48,7 @@ def retrieve_with_addrinfo(host)
             @log.debug("Socket.getaddrinfo failed to retrieve fqdn for hostname #{host} with: #{e}")
             return
           end
-          return if name.nil? || name.empty? || host == name[2]
+          return if name.nil? || name.empty? || host == name[2] || name[2] == name[3]
 
           name[2]
         end