vfolder APIs calls from admin blocked because of strict broad status check

[fregataa]

All vfolder API functions call ensure_vfolder_status() to check vfolder's status.
And ensure_vfolder_status() calls query_accessible_vfolders() to fetch all accessible vfolders.
Admins sometimes are blocked when check vfolder's status in ensure_vfolder_status because admins can access to too many folders and the ensure_vfolder_status function checks status of all accessible vfolder entries.

e.g) All users have .local vfolder and some of them are under deleted status. A user whose vfolder is ready status can rename it from .local, but admin cannot rename any .local vfolder.