Enable health indicator by default

Change-Id: I4a545cf0f64c1095ff22bb4fd4b567c4addacfc0
diff --git a/apps/tost-telegraf/values.yaml b/apps/tost-telegraf/values.yaml
index e139fff..b1f68a9 100644
--- a/apps/tost-telegraf/values.yaml
+++ b/apps/tost-telegraf/values.yaml
@@ -65,7 +65,7 @@
   onos_config_loader_label: app=onos-config-loader
 
 health_indicator:
-  enabled: false
+  enabled: true
   expected_hosts: []
   rtt_threshold_ms: 30
   # Health indicator return DOWN status when {packet_loss_threshold}% of packet loss