Run self-release on centos

Update self-release jobs to run on centos build node instead of
ubuntu

Change-Id: Iffee853a96b1b8c187d1c9db4a7b42edb1bc7c3e
Issue-ID: CIMAN-286
Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
diff --git a/jjb/ccsdk/sli-northbound.yaml b/jjb/ccsdk/sli-northbound.yaml
index 0de31a9..7918ebe 100644
--- a/jjb/ccsdk/sli-northbound.yaml
+++ b/jjb/ccsdk/sli-northbound.yaml
@@ -7,7 +7,8 @@
       - '{project-name}-{stream}-merge-java'
       - gerrit-maven-stage:
           build-node: centos7-builder-4c-4g
-      - '{project-name}-gerrit-release-jobs'
+      - '{project-name}-gerrit-release-jobs':
+          build-node: centos7-builder-4c-4g
 
     sign-artifacts: true
     project: 'ccsdk/sli/northbound'