dashboard_token_ttl option override possibility with default

roles/kubernetes-apps/ansible/templates/dashboard.yml.j2

@@ -166,6 +166,7 @@ spec:
           # If not specified, Dashboard will attempt to auto discover the API server and connect
           # to it. Uncomment only if the default does not work.
           # - --apiserver-host=http://my-address:port
+          - --token-ttl={{ dashboard_token_ttl }}
         volumeMounts:
         - name: kubernetes-dashboard-certs
           mountPath: /certs