Open Stack

Andrey fixed a bug [1] that we've talked about fixing forever which is 
to disallow AZ renames while the AZ has instances in it. This is a 
change in API behavior but it's really a "don't let admins shoot 
themselves in the foot" kind of thing. As such, it didn't have a 
microversion because users should not have to opt out of broken 
behavior, but I'm a bit hesitant about backporting the fix [2]. It has a 
release note so there would be some warning, but what do others think 
about backporting this?

[1] https://launchpad.net/bugs/1378904
[2] https://review.openstack.org/#/c/641351/

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Thanks,

Matt