Using test rwCore image in scale test experimental

Change-Id: I0f29e1f3605ceef9cf404228d736836cd96b1630
diff --git a/jjb/voltha-scale.yaml b/jjb/voltha-scale.yaml
index f6f3765..c1904ea 100644
--- a/jjb/voltha-scale.yaml
+++ b/jjb/voltha-scale.yaml
@@ -65,10 +65,11 @@
           openonuAdapterReplicas: 8
           onosReplicas: 3
           atomixReplicas: 3
-          extraHelmFlags: '--set debug=true'
+          extraHelmFlags: '--set debug=true,authRetry=true'
           withPcap: true
           onosImg:  andreacampanella/voltha-onos:aaa-identifier-cleanup-pier-socket
           openoltAdapterImg:  gcgirish/voltha-openolt-adapter:flowChanPerSub
+          rwCoreImg: matteoscandolo/voltha-rw-core:sync-delete
           radiusChart: /home/cord/helm-charts/freeradius