Fix data migration for ACLs
Improved etag handling
Remove obsolete NodeBackupManager code
Make ACL's ID always a number
Make ACL's ID always a number
Revert "Make ACL's ID always a number"

This reverts commit 5a2074029b089a11b2a4fd691eeee0bb48a583d0.
Revert "Make ACL's ID always a number"

This reverts commit 54fbc9c848d4438e9074d98604d0fec8c0482a4f.
Redo ACL ID change
Fix ACL ID test errors
Fix more test failures for ACL IDs
Polish up changes for ACL IDs
Match the current behavior when creating a new ACL
Merge pull request #537 from eric-wu/develop

ACL changes per code review feedback