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

Change-Id: I7f3457882830de050d1357254fc5483faf91d03f
diff --git a/xos-core/templates/tosca-deployment.yaml b/xos-core/templates/tosca-deployment.yaml
index 48eecf2..c6f8376 100644
--- a/xos-core/templates/tosca-deployment.yaml
+++ b/xos-core/templates/tosca-deployment.yaml
@@ -28,8 +28,8 @@
     spec:
       containers:
         - name: xos-tosca
-          image: {{ .Values.xos_toscaImage | quote }}
-          imagePullPolicy: {{ .Values.imagePullPolicy }}
+          image: {{ .Values.global.registry }}{{ .Values.images.xos_tosca.repository }}:{{ tpl .Values.images.xos_tosca.tag . }}
+          imagePullPolicy: {{ .Values.images.xos_tosca.pullPolicy }}
           ports:
             - containerPort: 9102
               port: 9102