Specify service port for Prometheus scraping

Closes #8431

roles/openshift_logging_elasticsearch/tasks/main.yaml

@@ -396,6 +396,7 @@
       metadata#annotations#prometheus.io/scrape: "true"
       metadata#annotations#prometheus.io/scheme: "https"
       metadata#annotations#prometheus.io/path: "/_prometheus/metrics"
+      metadata#annotations#prometheus.io/port: "4443"
 
 - name: Check to see if PVC already exists
   oc_obj: