After HDFS-7093, setting storage policy no longer requires superuser privilege. We should move the get/setStoragePolicy commands out from dfsadmin.
Move the quota commands out from dfsadmi.
Update archival storage user doc for list/set/get block storage policies
Refine hdfs admin classes to reuse common code
Remove SuperUser Check in Setting Storage Policy in FileStatus During Listing
Add config key to restrict setStoragePolicy