Add scaffolding for online image change #123
Merged
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This sketches out the flow for the online image change. Online image change is still not functional, but it lays out the structure of the code that I will fill in on subsequent PRs.
This also does more refactoring. There were additional changes I wanted to reuse in offlineimagechange_reconcile.go. Those were moved to ImageChangeInitiator, and that struct was renamed to ImageChangeManager.