XOS/NEM charts, use a global registry var, split docker image name/tag/pullPolicy

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-profiles/att-workflow/templates/tests/test-att-workflow.yaml b/xos-profiles/att-workflow/templates/tests/test-att-workflow.yaml
index 6e93795..f029cf3 100644
--- a/xos-profiles/att-workflow/templates/tests/test-att-workflow.yaml
+++ b/xos-profiles/att-workflow/templates/tests/test-att-workflow.yaml
@@ -23,8 +23,8 @@
   restartPolicy: Never
   containers:
     - name: {{ .Release.Name }}-api-test
-      image: {{ .Values.xos_api_testerImage }}
-      imagePullPolicy: {{ .Values.imagePullPolicy }}
+      image: {{ .Values.global.registry }}{{ .Values.images.xos_api_tester.repository }}:{{ tpl .Values.images.xos_api_tester.tag . }}
+      imagePullPolicy: {{ .Values.images.xos_api_tester.pullPolicy }}
       volumeMounts:
         - name: log-volume
           mountPath: /src/cord-api/Tests/Log/