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

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-services/onos-service/templates/deployment.yaml b/xos-services/onos-service/templates/deployment.yaml
index 967d501..0398ee0 100644
--- a/xos-services/onos-service/templates/deployment.yaml
+++ b/xos-services/onos-service/templates/deployment.yaml
@@ -38,8 +38,8 @@
     spec:
       containers:
         - name: {{ .Chart.Name }}
-          image: {{ tpl .Values.onos_synchronizerImage . | 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: