Cronjob resource is deprecated in batch/v2alpha1 from
k8s 1.8 and batch/v1beta1 is enabled by default. All the
CronJobs are already using batch/v1beta1 but there is condition
to check if api version have batch/v2alpha1.
Remove the api version constraint on batch/v2alpha1
Partial-Bug: #1753524
Change-Id: I7eeb7d6cc2630311ec5d613b9e059824daae0620
8c9ac9f5df