Change executor for periodic jobs

Change-Id: Ia4d6d0fab36ad288f0a17e9a3159cc14e38adbae
diff --git a/jjb/voltha-e2e.yaml b/jjb/voltha-e2e.yaml
index 840fda0..e499738 100644
--- a/jjb/voltha-e2e.yaml
+++ b/jjb/voltha-e2e.yaml
@@ -73,7 +73,7 @@
     parameters:
       - string:
           name: buildNode
-          default: 'ubuntu16.04-basebuild-4c-8g'
+          default: '{build-node}'
           description: 'Name of the Jenkins node to run the job on'
 
       - string: