Bump Telegraf (#3188)

stable/telegraf/Chart.yaml

 name: telegraf
-version: 0.2.2
+version: 0.3.0
 deprecated: true
 description: Telegraf is an agent written in Go for collecting, processing, aggregating, and writing metrics.
 keywords:

stable/telegraf/values.yaml

@@ -3,9 +3,8 @@
 ## ref: https://hub.docker.com/r/library/telegraf/tags/
 image:
   repo: "telegraf"
-  tag: "1.2.0-alpine"
+  tag: "1.5-alpine"
   pullPolicy: IfNotPresent
-
 ## Configure the telegraf daemonset here.
 ## Resource limits and outputs can be set seperately
 daemonset:
@@ -129,7 +128,6 @@ daemonset:
         url: "http://$HOSTNAME:10255"
         bearer_token: "/var/run/secrets/kubernetes.io/serviceaccount/token"
         insecure_skip_verify: true
-        
 ## Configure the telegraf single instance here.
 ## Resource limits and outputs can be set seperately
 single:
@@ -150,11 +148,9 @@ single:
   service:
     enabled: true
     type: ClusterIP
-    
   ## Exposed telegraf configuration
   ## For full list of possible values see `/docs/all-config-values.yaml` and `/docs/all-config-values.toml`
   ## ref: https://docs.influxdata.com/telegraf/v1.1/administration/configuration/
-  
   config:
 ##    global_tags:
 ##      dc: "us-east-1"