If you use mongorestore to restore user or role data, those updates could conflict with other user or role management operations going on in the cluster.
Mongos uses a distributed lock to prevent user modifications performed on one mongos from conflicting with modifications from another mongos, while mongod uses a mutex. We should acquire the same lock that the user management commands do whenever mongorestore is restoring user/role data to prevent conflicting writes.

Proposed way to do this is to introduce two new commands: lockAuthzUpdateLock and unlockAuthzUpdateLock, and use them in mongorestore.