updating bbsim pipeline for new dynamic scale bbsimtest

Change-Id: I0ddae9f1992ce0a643e689a975286b276b633ef6
diff --git a/jjb/bbsim-validation.yaml b/jjb/bbsim-validation.yaml
index 6922c2a..7fd5c19 100644
--- a/jjb/bbsim-validation.yaml
+++ b/jjb/bbsim-validation.yaml
@@ -49,6 +49,11 @@
          default: 'bbsim-voltha-master.yml'
          description: 'kubernetes configurations file'
 
+      - string:
+         name: OnuCount
+         default: '16'
+         description: 'Number of ONUs per pon port'
+
     project-type: pipeline
     concurrent: false