Use new label to find ONOS config POD

The lable for ONOS config loader is now "app=onos-config-loader"

Change-Id: I0036db1caeb8ee2f81bebcd871656c0e9246c52f
diff --git a/apps/tost-telegraf/values.yaml b/apps/tost-telegraf/values.yaml
index 5a9216f..28485e9 100644
--- a/apps/tost-telegraf/values.yaml
+++ b/apps/tost-telegraf/values.yaml
@@ -52,6 +52,6 @@
   server: localhost
   port: 8181
   namespace: tost
-  component_label: onos-tost-config
+  component_label: app=onos-config-loader
   ready_script: /root/onos/bin/check-onos-status
   container_name: onos-classic