adding oltdebversion to physical pod build jobs

Change-Id: Id8f00affaa2d8fd2700a90845570a884dbeb4911
diff --git a/jjb/cord-test/nightly-build-pipeline.yaml b/jjb/cord-test/nightly-build-pipeline.yaml
index f00eef5..c842d8d 100644
--- a/jjb/cord-test/nightly-build-pipeline.yaml
+++ b/jjb/cord-test/nightly-build-pipeline.yaml
@@ -445,7 +445,7 @@
 
       - string:
          name: oltDebVersion
-         default: ''
+         default: '{oltDebVersion}'
          description: 'OLT Software version to install'
 
       - string: