Revert to ubuntu, centos fails

Issue-ID: CIMAN-33
Signed-off-by: Jimmy Forsyth <jf2512@att.com>
Change-Id: I4e1d6f827694f92aea5a75b298241164fb8ca0a8
diff --git a/jjb/aai/aai-aai-common.yaml b/jjb/aai/aai-aai-common.yaml
index cbf92fe..1125ec2 100644
--- a/jjb/aai/aai-aai-common.yaml
+++ b/jjb/aai/aai-aai-common.yaml
@@ -12,8 +12,7 @@
       - '{project-name}-{stream}-verify-java'
       - '{project-name}-{stream}-merge-java'
       - gerrit-maven-stage:
-          sign-artifacts: true
-          build-node: centos7-builder-4c-4g
+          build-node: ubuntu1604-builder-4c-4g
           maven-versions-plugin: true
     project: 'aai/aai-common'
     stream: