Adding custom BBSIM service file for 1-64-63 scale job

Change-Id: I2f420af498f3b3790272949b0dc1f5ed498bb5a8
diff --git a/jjb/voltha-scale.yaml b/jjb/voltha-scale.yaml
index 696591e..e3a6f05 100644
--- a/jjb/voltha-scale.yaml
+++ b/jjb/voltha-scale.yaml
@@ -134,7 +134,7 @@
             withEapol: false
             withDhcp: false
             withIgmp: false
-            extraHelmFlags: '-f /home/jenkins/voltha-scale/voltha-values.yaml --set uni=1 --set etcd.persistence.enabled=true,etcd.persistence.storageClass=longhorn'
+            extraHelmFlags: '-f /home/jenkins/voltha-scale/voltha-values.yaml --set uni=1 --set etcd.persistence.enabled=true,etcd.persistence.storageClass=longhorn -f /home/cord/dt-custom-values.yaml'
 
       # multi-stack jobs
       - 'voltha-scale-measurements':