Moving from centos7 nodes to ubuntu

Change-Id: Id42076f1c5e87ed42890d28c306e9fffdf1ddd88
Signed-off-by: JulienBe <jb379x@att.com>
diff --git a/jjb/ui/ui-dmaapbc.yaml b/jjb/ui/ui-dmaapbc.yaml
index 6ffba03..2624083 100644
--- a/jjb/ui/ui-dmaapbc.yaml
+++ b/jjb/ui/ui-dmaapbc.yaml
@@ -13,4 +13,4 @@
     mvn-settings: 'ui-dmaapbc-settings'
     files: '**'
     archive-artifacts: ''
-    build-node: centos7-basebuild-4c-4g
+    build-node: ubuntu1604-basebuild-4c-4g