For non-XOS charts, use a global registry var, split docker image name/tag/pullPolicy

Change-Id: Icffc569e2c152e0b413f4c7b7d9a546bd9a3ef58
diff --git a/storage/rook-tools/templates/toolbox.yaml b/storage/rook-tools/templates/toolbox.yaml
index be5db7b..0b14243 100644
--- a/storage/rook-tools/templates/toolbox.yaml
+++ b/storage/rook-tools/templates/toolbox.yaml
@@ -22,8 +22,8 @@
   dnsPolicy: ClusterFirstWithHostNet
   containers:
   - name: rook-ceph-tools
-    image: {{ .Values.rookCephToolsImage | quote }}
-    imagePullPolicy: {{ .Values.imagePullPolicy }}
+    image: {{ .Values.global.registry }}{{ .Values.image.repository }}:{{ tpl .Values.image.tag . }}
+    imagePullPolicy: {{ .Values.image.pullPolicy }}
     env:
       - name: ROOK_ADMIN_SECRET
         valueFrom: