override only the tag portion of onos_config_loader

Change-Id: Ie1c7fe109cb61eb6b30cb76e88c85814cdc85016
diff --git a/voltha-infra/values.yaml b/voltha-infra/values.yaml
index 37d85db..d312d91 100644
--- a/voltha-infra/values.yaml
+++ b/voltha-infra/values.yaml
@@ -25,7 +25,7 @@
   onos_config_loader:
     registry: '{{ .Values.global.image_registry }}'
     repository: '{{ .Values.global.image_org }}voltha-ci-tools'
-    tag: '{{- if hasKey .Values.global "image_tag" }}{{- if .Values.global.image_tag }}{{ .Values.global.image_tag }}{{- else }}2.3.2-onos-config-loader{{- end }}{{- else }}2.3.2-onos-config-loader{{- end }}'
+    tag: '{{- if hasKey .Values.global "image_tag" }}{{- if .Values.global.image_tag }}{{ .Values.global.image_tag }}-onos-config-loader{{- else }}2.3.2-onos-config-loader{{- end }}{{- else }}2.3.2-onos-config-loader{{- end }}'
     pullPolicy: '{{ .Values.global.image_pullPolicy }}'
 
 # components config