Open Stack

It's been deprecated since Pike, and the time has come to remove it [1].

mgagne has been the most vocal CachingScheduler operator I know and he 
has tested out the "nova-manage placement heal_allocations" CLI, added 
in Rocky, and said it will work for migrating his deployment from the 
CachingScheduler to the FilterScheduler + Placement.

If you are using the CachingScheduler and have a problem with its 
removal, now is the time to speak up or forever hold your peace.

[1] https://review.openstack.org/#/c/611723/1

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Thanks,

Matt