log-collector: set non-deprecated es.transport.cname_in_publish_address

Relevant log spam:

es.http.cname_in_publish_address system property is deprecated and no
longer affects http.publish_address formatting. Remove this property to
get rid of this deprecation warning.

roles/log-collector/templates/elasticsearch/jvm.options

@@ -102,5 +102,5 @@
 #9-:-Djava.locale.providers=COMPAT
 
 # Silence annoying warning (cf. https://discuss.elastic.co/t/http-publish-host-was-printed-as-ip-port-instead-of-hostname-ip-port/170820/2)
--Des.http.cname_in_publish_address=true
+-Des.transport.cname_in_publish_address=true