Fix gerrit-mvn job errors

Change-Id: Iab852b4ade5d2a711c38779c5c4b2eee026e9dd1
Signed-off-by: Vijay Venkatesh Kumar <vv770d@att.com>
Issue-ID: DCAEGEN2-1578
diff --git a/jjb/dcaegen2/dcaegen2-services-sdk.yaml b/jjb/dcaegen2/dcaegen2-services-sdk.yaml
index f191fbc..153562b 100644
--- a/jjb/dcaegen2/dcaegen2-services-sdk.yaml
+++ b/jjb/dcaegen2/dcaegen2-services-sdk.yaml
@@ -6,8 +6,7 @@
       - '{project-name}-{stream}-verify-java'
       - '{project-name}-{stream}-merge-java'
       - gerrit-maven-stage:
-          sign-artifacts: true
-          build-node: centos7-docker-8c-8g
+          build-node: ubuntu1604-docker-8c-8g
           maven-versions-plugin: true
 
     project: 'dcaegen2/services/sdk'