Removing REPO from the physical test jobs

Change-Id: Ib3e4188ba88e2c39bd9e75e229be9191946f1490
diff --git a/jjb/cord-test/voltha.yaml b/jjb/cord-test/voltha.yaml
index 366d4e6..b9be148 100644
--- a/jjb/cord-test/voltha.yaml
+++ b/jjb/cord-test/voltha.yaml
@@ -17,6 +17,9 @@
     num-of-atomix: '0'
     reinstall-olt: true
     test-type: ''
+    volthaSystemTestsChange: ''
+    kindVolthaChange: ''
+    cordTesterChange: ''
 
     jobs:
       # flex OCP pod with olt/onu - manual test job, voltha master build job