Using custom image in TT master scale test

Change-Id: I986fa8c5f73547a291b3bbdcebdb815828998b61
diff --git a/jjb/voltha-scale.yaml b/jjb/voltha-scale.yaml
index 9f9c459..f5d8c89 100644
--- a/jjb/voltha-scale.yaml
+++ b/jjb/voltha-scale.yaml
@@ -63,9 +63,7 @@
           withDhcp: true
           withIgmp: false
           extraHelmFlags: '--set authRetry=true,dhcpRetry=true --set global.log_correlation.enabled=true -f /home/jenkins/voltha-scale/voltha-values.yaml'
-          # onosImg: registry.menlo.onlab.us/voltha-dev/voltha-onos:teo-olt
-          # volthaHelmChartsChange: refs/changes/29/23729/3
-          openoltAdapterImg: gcgirish/voltha-openolt-adapter:meter
+          bbsimImg: matteoscandolo/bbsim:gemport
 
       - 'voltha-scale-measurements':
           name: 'voltha-scale-measurements-master-2-16-32-dt-subscribers'