unify_hosts rake task does not output progress status
The unify_hosts rake task is run as part of installs/upgrades. During this time, it's hard to tell how far along the task is. If a user has a large number of hosts, this script can take tens of minutes to complete.
Ideally, the script could output status with "500 of 25123 processed, 1000 of 25123 processed", etc.