Updated bb values.yaml to have a global value for image pull policy for all core packages

Package Merge Request

Package Changes

• Updated chart/values.yaml to include a global value for imagePullPolicy for all core packages (imagePullPolicy:{})
• Updated the values.yaml for all the core package template/spec in BB to make sure the global value is passed down to all core packages
• Updated image_pull_policy.md doc to show how to use the new global value for the core packages

For Issue

Closes #897 (closed)

chart/templates/clusterauditor/values.yaml

@@ -7,6 +7,9 @@ elasticsearch:
   imagePullSecrets:
     - name: private-registry
 
+image:
+  imagePullPolicy: {{ .Values.imagePullPolicy }}
+
 monitoring:
   enabled: {{ .Values.monitoring.enabled }}