set env var INFRABOX_CRONJOB if build was triggered  by cronjob
@@ -971,7 +971,7 @@ class Scheduler(object):
trigger = {
'branch_or_sha': c['sha'],
'env': [{
- 'name': 'INFRABOX_TRIGGER',
+ 'name': 'INFRABOX_CRONJOB',
'value': 'true'
}]
}
