replacing a failed infra causes the new one to be unregistered

[ioggstream]

Reproduce

• I have 2 infra nodes

infra-0
infra-1

• infra-1 fails, I mark it unhealty and update the stack

o stack resource mark unhealthy  shift...infra... 1
o stack update shift --existing

• a new infra-1 is created
• the old infra-1 is removed

I expect

• deployment-bastion-node-cleanup to be run against the old node, if present

Instead

• deployment-bastion-node-cleanup references infra-1 by hostname, so it will unregister the new node