Enabling DHCP Retry in experimental scale job

Change-Id: I623d6723038cc92cbcc38f47a2f0cf154263502b
diff --git a/jjb/voltha-scale.yaml b/jjb/voltha-scale.yaml
index 2419067..0bd0bbf 100644
--- a/jjb/voltha-scale.yaml
+++ b/jjb/voltha-scale.yaml
@@ -67,7 +67,7 @@
           openonuAdapterReplicas: 8
           onosReplicas: 3
           atomixReplicas: 3
-          extraHelmFlags: '--set authRetry=true'
+          extraHelmFlags: '--set authRetry=true,dhcpRetry=true'
           withPcap: true
           bbsimImg: matteoscandolo/bbsim:nni-packet-logs
           ofAgentImg: matteoscandolo/voltha-ofagent-go:flow-delete-serial