Fix annotations in svc.yaml (helm#2905)

* Fix annotations in svc.yaml

If `.Values.service.annotations` is empty (which is the default configuration), the field `annotations` will be blank, producing a failed deployment.

This patch only adds service annotations if they exist.

* Update Chart.yaml

Author: Jorge Marin

stable/redis/Chart.yaml

@@ -1,5 +1,5 @@
 name: redis
-version: 1.1.0
+version: 1.1.1
 appVersion: 4.0.2
 description: Open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
 keywords:

stable/redis/templates/svc.yaml

@@ -8,9 +8,9 @@ metadata:
     release: "{{ .Release.Name }}"
     heritage: "{{ .Release.Service }}"
   annotations:
-    {{- range $key, $value := .Values.service.annotations }}
-    {{ $key }}: {{ $value | quote }}
-    {{- end }}
+{{- if .Values.service.annotations }}
+{{ toYaml .Values.service.annotations | indent 4 }}
+{{- end }}
 {{- if .Values.metrics.enabled }}
 {{ toYaml .Values.metrics.annotations | indent 4 }}
 {{- end }}