VOL-1797 - fix helm lint issues

Change-Id: I74ccff1f7f431e05fc3963d0707382f478a010f0
diff --git a/voltha-adapter-openonu/Chart.yaml b/voltha-adapter-openonu/Chart.yaml
index 558d5a4..d372a21 100644
--- a/voltha-adapter-openonu/Chart.yaml
+++ b/voltha-adapter-openonu/Chart.yaml
@@ -17,5 +17,5 @@
 description: A Helm chart for Voltha OpenONU Adapter
 icon: https://guide.opencord.org/logos/cord.svg
 
-version: 2.0.1
+version: 2.0.2
 appVersion: 2.0.0
diff --git a/voltha-adapter-openonu/templates/adapters-openolt.yaml b/voltha-adapter-openonu/templates/adapters-openolt.yaml
index d4afdc7..9447d90 100644
--- a/voltha-adapter-openonu/templates/adapters-openolt.yaml
+++ b/voltha-adapter-openonu/templates/adapters-openolt.yaml
@@ -37,7 +37,7 @@
     spec:
       containers:
         - name: adapter-open-onu
-          image: {{ tpl .Values.images.adapter_open_onu.registry . }}{{ tpl .Values.images.adapter_open_onu.repository . }}:{{ tpl .Values.images.adapter_open_onu.tag . }}
+          image: {{ tpl .Values.images.adapter_open_onu.registry . }}{{ tpl .Values.images.adapter_open_onu.repository . }}:{{ tpl ( tpl .Values.images.adapter_open_onu.tag . ) . }}
           imagePullPolicy: {{ tpl .Values.images.adapter_open_onu.pullPolicy . }}
           args:
             - "/voltha/adapters/brcm_openomci_onu/main.py"
diff --git a/voltha-adapter-openonu/values.yaml b/voltha-adapter-openonu/values.yaml
index 234f580..3070a8a 100644
--- a/voltha-adapter-openonu/values.yaml
+++ b/voltha-adapter-openonu/values.yaml
@@ -15,10 +15,10 @@
 ---
 # Default overrides
 defaults:
-  image_registry:
-  image_tag:
-  image_org:
-  image_pullPolicy:
+  image_registry: ""
+  image_tag: '{{ .Chart.AppVersion }}'
+  image_org: "voltha/"
+  image_pullPolicy: "Always"
 
 # Define connectivity to required services
 services:
@@ -41,7 +41,7 @@
 
 images:
   adapter_open_onu:
-    registry: '{{ .Values.defaults.image_registry | default "" }}'
-    repository: '{{ .Values.defaults.image_org | default "voltha/" }}voltha-openonu-adapter'
-    tag: '{{ .Values.defaults.image_tag | default .Chart.AppVersion }}'
-    pullPolicy: '{{ .Values.defaults.image_pullPolicy | default "Always" }}'
+    registry: '{{ .Values.defaults.image_registry }}'
+    repository: '{{ .Values.defaults.image_org }}voltha-openonu-adapter'
+    tag: '{{ .Values.defaults.image_tag }}'
+    pullPolicy: '{{ .Values.defaults.image_pullPolicy }}'