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

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-tools/xossh/templates/deployment.yaml b/xos-tools/xossh/templates/deployment.yaml
index 0e9540a..44af9ff 100644
--- a/xos-tools/xossh/templates/deployment.yaml
+++ b/xos-tools/xossh/templates/deployment.yaml
@@ -47,8 +47,8 @@
                - "{{ .Values.xosshConfig.accessor.endpoint }}"
           stdin: true
           tty: true
-          image: {{ tpl .Values.xosshImage . | quote }}
-          imagePullPolicy: {{ .Values.imagePullPolicy }}
+          image: {{ .Values.global.registry }}{{ .Values.image.repository }}:{{ tpl .Values.image.tag . }}
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
           resources:
 {{ toYaml .Values.resources | indent 12 }}
           volumeMounts: