Tune measurement filtering for haproxy telegraf plugin

Change-Id: I9bda8de3015315aa78b877d7fbe19f7e1ff67969
diff --git a/haproxy/meta/telegraf.yml b/haproxy/meta/telegraf.yml
index 6e28f3b..a14e442 100644
--- a/haproxy/meta/telegraf.yml
+++ b/haproxy/meta/telegraf.yml
@@ -4,5 +4,8 @@
 agent:
   input:
     haproxy:
+      # Input plugin configuration
       servers: {{ servers|yaml }}
+      # Measurement filtering
+      fielddrop: [ "addr", "agent_status", "check_status", "cookie", "last_agt", "last_chk", "mode", "status", "tracked" ]
 {%- endif %}