Disable swarm metrics by default

There is a possibility to have docker nodes without swarm, it means
that we mustn't gather swarm metris by default, we should enable it
only on swarm nodes.

Change-Id: I92528b63442a5fe41a834dcdd91fdfb4b8f2aab1
Related-PROD: PROD-23737
diff --git a/docker/meta/telegraf.yml b/docker/meta/telegraf.yml
index d2fdf5c..36a437a 100644
--- a/docker/meta/telegraf.yml
+++ b/docker/meta/telegraf.yml
@@ -10,7 +10,7 @@
       timeout: 5
       perdevice: true
       total: false
-      gather_services: true
+      gather_services: false
       container_name_exclude: [ "*" ]
       # Measurement filtering
       namepass: [ "docker", "docker_swarm" ]