Update vmpooler chart to accept image tag override

Prior to this, the only way to set the image tag was by modifying the
appVersion param of the chart itself. This made it impossible to use a
non-default image version.

helm-charts/vmpooler/Chart.yaml

@@ -3,7 +3,7 @@ name: vmpooler
 description: A Helm chart to deploy vmpooler
 type: application
 icon: https://github.com/puppetlabs/vmpooler/raw/master/lib/vmpooler/public/img/logo.png
-version: 1.7.0
+version: 1.7.1
 appVersion: 1.0.0-prod-all-providers
 dependencies:
   - name: redis

helm-charts/vmpooler/templates/deployment-api.yaml

@@ -32,7 +32,7 @@ spec:
       - name: {{ $fullName }}-api
         securityContext:
           {{- toYaml .Values.securityContext | nindent 12 }}
-        image: "{{ .Values.image.repository }}:{{ .Chart.AppVersion }}"
+        image: "{{ .Values.image.repository }}:{{ default .Chart.AppVersion .Values.image.tag }}"
         imagePullPolicy: {{ .Values.image.pullPolicy }}
         ports:
           - containerPort: {{ .Values.service.port }}

helm-charts/vmpooler/templates/deployment-manager.yaml

@@ -38,7 +38,7 @@ spec:
       - name: {{ $fullName }}-manager
         securityContext:
           {{- toYaml .Values.securityContext | nindent 12 }}
-        image: "{{ .Values.image.repository }}:{{ .Chart.AppVersion }}"
+        image: "{{ .Values.image.repository }}:{{ default .Chart.AppVersion .Values.image.tag }}"
         imagePullPolicy: {{ .Values.image.pullPolicy }}
         ports:
         - containerPort: {{ .Values.service.port }}