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

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-core/templates/tests/test-xos-core-api.yaml b/xos-core/templates/tests/test-xos-core-api.yaml
index 7899b00..1162de0 100644
--- a/xos-core/templates/tests/test-xos-core-api.yaml
+++ b/xos-core/templates/tests/test-xos-core-api.yaml
@@ -25,8 +25,8 @@
   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/