nodelocaldns: allow to set health port, switch to 9254 by default (#4902)

8080 is a pretty common port, using nodelocaldns_ip:8080 still
prevents node processes or hostNetwork=true processes to bind to *:8080
so switch to 9254 by default (prometheus port is 9253)

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

roles/kubernetes-apps/ansible/templates/nodelocaldns-config.yml.j2

@@ -21,7 +21,7 @@ data:
             force_tcp
         }
         prometheus :9253
-        health {{ nodelocaldns_ip }}:8080
+        health {{ nodelocaldns_ip }}:{{ nodelocaldns_health_port }}
     }
     in-addr.arpa:53 {
         errors