Use ubuntu node for packer

Use ubuntu based node for packer verifications

Change-Id: I6cb6d192880a9ed38fae663a93362a05aac94324
Issue-ID: CIMAN-33
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
diff --git a/jjb/ci-management/ci-management.yaml b/jjb/ci-management/ci-management.yaml
index 528639e..16ae88b 100644
--- a/jjb/ci-management/ci-management.yaml
+++ b/jjb/ci-management/ci-management.yaml
@@ -21,7 +21,7 @@
     project-name: 'ci-management'
     branch: master
     archive-artifacts: '**/*.log'
-    build-node: 'centos7-builder-2c-1g'
+    build-node: 'ubuntu1604-builder-4c-4g'
     platforms:
       - centos
       - ubuntu-16.04