updated voltha job back to nightly

Change-Id: I65c3a15793d7458689bae3879fe988585e7dc391
diff --git a/jjb/cord-test/nightly-build-pipeline.yaml b/jjb/cord-test/nightly-build-pipeline.yaml
index 6695ed6..fda3ee1 100644
--- a/jjb/cord-test/nightly-build-pipeline.yaml
+++ b/jjb/cord-test/nightly-build-pipeline.yaml
@@ -880,7 +880,7 @@
     triggers:
        - timed: |
                  TZ=America/Los_Angeles
-                 H H/3 * * *
+                 H {time} * * *
 
 - job-template:
     name: 'build_{config-pod}_voltha_{release}_test'