Set centos node for stage jobs

Issue-ID: AAI-2703
Signed-off-by: Jimmy Forsyth <jf2512@att.com>
Change-Id: Ia88c390e6c5e3881e50fb16ad3d55484793d4137
diff --git a/jjb/aai/aai-aai-common.yaml b/jjb/aai/aai-aai-common.yaml
index 51fec37..6fdabeb 100644
--- a/jjb/aai/aai-aai-common.yaml
+++ b/jjb/aai/aai-aai-common.yaml
@@ -12,7 +12,8 @@
       - '{project-name}-{stream}-verify-java'
       - '{project-name}-{stream}-merge-java'
       - gerrit-maven-stage:
-          build-node: ubuntu1604-builder-4c-4g
+          sign-artifacts: true
+          build-node: centos7-builder-4c-4g
           maven-versions-plugin: true
       - '{project-name}-gerrit-release-jobs':
           build-node: centos7-docker-8c-8g