Revert job to running daily VS every 30 min

Change-Id: I19aed27e15002ce0d5084101c9f4616173be5e9f
diff --git a/jjb/voltha-e2e/master.yaml b/jjb/voltha-e2e/master.yaml
index bc9d6bb..4c0433b 100644
--- a/jjb/voltha-e2e/master.yaml
+++ b/jjb/voltha-e2e/master.yaml
@@ -76,8 +76,8 @@
           name: 'periodic-voltha-test-bbsim'
           code-branch: 'master'
           extraHelmFlags: '--set global.image_tag=master --set onos-classic.image.tag=master --set onos-classic.replicas=3,onos-classic.atomix.replicas=3 --set voltha.onos_classic.replicas=3 '
-#          time-trigger: "H H/23 * * *"       # Build daily at 11pm
-          time-trigger: "H/30 * * * *"        # Build every 30 min
+          time-trigger: "H H/23 * * *"       # Build daily at 11pm
+#          time-trigger: "H/30 * * * *"        # Build every 30 min
           testTargets: |
             - target: functional-single-kind
               workflow: att