Omit hostname in metrics tags as by default it is set to docker container ID

Change-Id: Iaa05f979e3bb635904a7354309de3731500172eb
diff --git a/telegraf/agent/remote.yml b/telegraf/agent/remote.yml
index ecbae25..c634d54 100644
--- a/telegraf/agent/remote.yml
+++ b/telegraf/agent/remote.yml
@@ -3,6 +3,7 @@
 parameters:
   telegraf:
     remote_agent:
+      omit_hostname: true
       dir:
         config: /srv/volumes/local/telegraf
         config_d: /srv/volumes/local/telegraf/telegraf.d