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)

docs/guides/using_bigbang/image_pull_policy.md

 # ImagePullPolicy at Big Bang Level
 
-Big Bang is currently working to standardize the adoption of a global image pull policy so that customers can set a single value and have it passed to all packages. This work is not yet complete, but should allow customers easier control over their global pull policy.
+Big Bang is currently working to standardize the adoption of a global image pull policy so that customers can set a single value and have it passed to all packages. 
+The global image pull policy has been adopted in Big Bang for the core packages currently. In the Big Bang values.yaml file, a global parameter has been created to set the global image pull policy (line 114, `ImagePullPolicy: IfNotPresent`) and it gets passed down to all core packages spec. The default value for this global policy is `IfNotPresent`.
 
-In the meantime we have begun to document the package overrides required in preparation for this change.
+This work is not yet complete for addons, but should allow customers easier control over their global pull policy.
+
+We have also documented the package overrides required in preparation for this change in the table below.
 
 # ImagePullPolicy per Package
 
 | Package | Default | Value Override |
 |---|---|---|
-| Istio Controlplane | None | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| Istio Operator | `IfNotPresent` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| Jaeger | `Always` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| Kiali | `IfNotPresent` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| Cluster Auditor | `Always` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| OPA Gatekeeper | `IfNotPresent` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| Elasticsearch / Kibana | `IfNotPresent` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| ECK Operator | `IfNotPresent` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| Fluentbit | `Always` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| Monitoring | Varies | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre> |
-| Twistlock | `IfNotPresent` | <pre lang="yaml">imagePullPolicy: IfNotPresent</pre>  |
+| Istio Controlplane | None | <pre lang="yaml">istio:<br>  values:<br>    imagePullPolicy: IfNotPresent</pre> |
+| Istio Operator | `IfNotPresent` | <pre lang="yaml">istio-operator:<br>  values:<br>    imagePullPolicy: IfNotPresent</pre> |
+| Jaeger | `Always` | <pre lang="yaml">jaeger:<br>  values:<br>    image:<br>      pullPolicy: IfNotPresent</pre> |
+| Kiali | `IfNotPresent` | <pre lang="yaml">kiali:<br>  values:<br>    image:<br>      pullPolicy: IfNotPresent<br>    cr:<br>      spec:<br>        deployment:<br>          image_pull_policy: IfNotPresent</pre> |
+| Cluster Auditor | `Always` | <pre lang="yaml">clusterAuditor:<br>  values:<br>    image:<br>      imagePullPolicy: IfNotPresent</pre> |
+| OPA Gatekeeper | `IfNotPresent` | <pre lang="yaml">gatekeeper:<br>  values:<br>    postInstall:<br>      labelNamespace:<br>        image:<br>          pullPolicy: IfNotPresent<br>    postUpgrade:<br>      cleanupCRD:<br>        image:<br>          pullPolicy: IfNotPresent<br>    image:<br>      pullPolicy: IfNotPresent</pre> |
+| Elasticsearch / Kibana | `IfNotPresent` | <pre lang="yaml">logging:<br>  values:<br>    imagePullPolicy: IfNotPresent</pre> |
+| ECK Operator | `IfNotPresent` | <pre lang="yaml">eckoperator:<br>  values:<br>    image:<br>      pullPolicy: IfNotPresent</pre> |
+| Fluentbit | `Always` | <pre lang="yaml">fluentbit:<br>  values:<br>    image:<br>      pullPolicy: IfNotPresent</pre> |
+| Monitoring | Varies | <pre lang="yaml">monitoring:<br>  values: <br>    kube-state-metrics:<br>      image:<br>        pullPolicy: IfNotPresent<br>    grafana:<br>      image:<br>        pullPolicy: IfNotPresent<br>    prometheus-node-exporter:<br>      image:<br>        pullPolicy: IfNotPresent<br>    prometheusOperator:<br>      image:<br>        pullPolicy: IfNotPresent<br>      admissionWebhooks:<br>        cleanupProxy:<br>          image:<br>            pullPolicy: IfNotPresent<br>        patch: <br>          image:<br>            pullPolicy: IfNotPresent</pre> |
+| Twistlock | `IfNotPresent` | <pre lang="yaml">twistlock:<br>  values:<br>    console:<br>      image:<br>        imagePullPolicy: IfNotPresent</pre>  |
 | ArgoCD | Varies | <pre lang="yaml">addons:<br>  argocd:<br>    values:<br>      global:<br>        image:<br>          imagePullPolicy: IfNotPresent<br>      controller:<br>        image:<br>          imagePullPolicy: IfNotPresent<br>      dex:<br>        image:<br>          imagePullPolicy: IfNotPresent<br>      redis-bb:<br>        image:<br>          pullPolicy: IfNotPresent<br>      server:<br>        image:<br>          imagePullPolicy: IfNotPresent<br>      repoServer:<br>        image:<br>          imagePullPolicy: IfNotPresent</pre> |
 | Authservice | `IfNotPresent` | <pre lang="yaml">addons:<br>  authservice:<br>    values:<br>      image:<br>        pullPolicy: IfNotPresent</pre> |
 | MinIO Operator | `IfNotPresent` | <pre lang="yaml">addons:<br>  minioOperator:<br>    values:<br>      operator:<br>        image:<br>          pullPolicy: IfNotPresent</pre> |