* Fix a job quota related deadlock
In case ResourceQuota is used and sets a max # of jobs, a CronJob may get
trapped in a deadlock:
1. Job quota for a namespace is reached.
2. CronJob controller can't create a new job, because quota is
reached.
3. Cleanup of jobs owned by a cronjob doesn't happen, because a
control loop iteration is finished because of an error to create a
job.
To fix this we stop early quitting from a control loop iteration when
cronjob reconciliation failed and always let old jobs to be cleaned up.
* Dont reorder imports
* Don't stop requeuing on reconciliation error
Previous code only logged the reconciliation error inside jm.sync() and
didn't return the reconciliation error to it's invoker
processNextWorkItem().
Adding a copy-paste back to avoid this issue.
* Remove copy-pasted cleanupFinishedJobs()
Now we always call jm.cleanupFinishedJobs() first and then
jm.syncCronJob().
We also extract cronJobCopy and updateStatus outside jm.syncCronJob
function and pass pointers to them in both jm.syncCronJob and
jm.cleanupFinishedJobs to make delayed updates handling more explicit
and not dependent on the order in which cleanupFinishedJobs and
syncCronJob are invoked.
* Return updateStatus bool instead of changing the reference
* Explicitly ignore err in tests to fix linter
a46bab6930