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

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-profiles/demo-exampleservice/templates/tosca-job.yaml b/xos-profiles/demo-exampleservice/templates/tosca-job.yaml
index 0bba3f6..53cce60 100644
--- a/xos-profiles/demo-exampleservice/templates/tosca-job.yaml
+++ b/xos-profiles/demo-exampleservice/templates/tosca-job.yaml
@@ -35,8 +35,8 @@
       restartPolicy: OnFailure
       containers:
         - name: {{ .Chart.Name }}-tosca-loader
-          image: {{ tpl .Values.tosca_loaderImage . | quote }}
-          imagePullPolicy: {{ .Values.imagePullPolicy }}
+          image: {{ .Values.global.registry }}{{ .Values.image.repository }}:{{ tpl .Values.image.tag . }}
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
           env:
             - name: XOS_USER
               value: {{ .Values.xosAdminUser }}