updates coredns version (#2694)

* Uptade version from 006 to 011
* Adapt errors from stderr to stdout

stable/coredns/Chart.yaml

@@ -1,5 +1,5 @@
 name: coredns
-version: 0.6.0
+version: 0.7.0
 description: CoreDNS is a DNS server that chains middleware and provides Kubernetes
   DNS Services
 keywords:

stable/coredns/values.yaml

@@ -6,7 +6,7 @@ replicaCount: 1
 
 image:
   repository: coredns/coredns
-  tag: "006"
+  tag: "011"
   pullPolicy: IfNotPresent
 
 resources:
@@ -46,7 +46,7 @@ middleware:
     port: "9153"
   errors:
     enabled: true
-    file: "stderr"
+    file: "stdout"
   log:
     enabled: false
     file: "stdout"