Merge branch 'gatekeeper-pullsecrets-for-deleteWebhookConfigurations' into 'master'

Adding preUninstall/deleteWebhookConfigurations to chart/templates/gatekeeper/values.yaml

Closes platform-one/big-bang/apps/core/policy#162

See merge request platform-one/big-bang/bigbang!1978

chart/templates/gatekeeper/values.yaml

@@ -20,6 +20,12 @@ postUpgrade:
       pullPolicy: {{ .Values.imagePullPolicy }}
       pullSecrets:
       - name: private-registry
+preUninstall:
+  deleteWebhookConfigurations:
+    image:
+      pullPolicy: {{ .Values.imagePullPolicy }}
+      pullSecrets:
+      - name: private-registry
 
 networkPolicies:
   enabled: {{ .Values.networkPolicies.enabled }}