Migrate to gerrit-maven-stage (DEMO)

Migrate to use gerrit-maven-stage from
global-jjb to allow the generation of
signed release artifacts that will reduce
release processing time.

Change-Id: I8feedf8852a622ff3202c6dc0ef205009258f047
Issue-ID: CIMAN-234
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
diff --git a/jjb/demo/demo.yaml b/jjb/demo/demo.yaml
index 46ccfc3..e04cc57 100644
--- a/jjb/demo/demo.yaml
+++ b/jjb/demo/demo.yaml
@@ -11,6 +11,10 @@
     jobs:
       - '{project-name}-{stream}-verify-java'
       - '{project-name}-{stream}-merge-java'
+      - gerrit-maven-stage:
+          sign-artifacts: true
+          build-node: centos7-builder-4c-4g
+          maven-versions-plugin: true
       - '{project-name}-{stream}-release-version-java-daily'
 
     project: 'demo'