Fix controller deadlock when checking for stale cache (#1046)
Fix controller deadlock when checking for stale cache (#1046)

* Controller cache was susceptible to clock skew in managed cluster

* Fix controller deadlock when checking for stale cache

argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd