Attempt to run hourly job only if there's change on git

Change-Id: Id4ef88cbe8ea2ba257f6d8963e9343ba8a5225e7
diff --git a/jjb/onos/onos-verify.yaml b/jjb/onos/onos-verify.yaml
index 2f9b44b..2f78f65 100644
--- a/jjb/onos/onos-verify.yaml
+++ b/jjb/onos/onos-verify.yaml
@@ -62,7 +62,7 @@
                exclude-drafts: true
                exclude-trivial-rebase: false
                exclude-no-code-change: true
-           - draft-published-event
+           - draft-published-event: true
            - comment-added-contains-event:
                comment-contains-value: '(?i)^.*recheck$'
          projects:
@@ -134,7 +134,8 @@
           jenkins-ssh-credential: '{jenkins-ssh-credential}'
 
     triggers:
-      - timed: '@hourly'
+      - pollscm:
+          cron: '@hourly'
 
 # FIXME - there is a Slack integration plugin in 2.0.3
     publishers:
@@ -624,4 +625,3 @@
 
     jobs:
       - 'onos-{stream}-stc-verify'
-