aws: undeprecate min_elb_capacity; restore min capacity waiting #4864
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It was a mistake to switched fully to
==
when activating waiting forcapacity on updates in #3947. Users that didn't set
min_elb_capacity == desired_capacity
and instead treated it as an actual "minimum" wouldsee timeouts for every create, since their target numbers would never be
reached exactly.
Here, we fix that regression by restoring the minimum waiting behavior
during creates.
In order to preserve all the stated behavior, I had to split out
different criteria for create and update, criteria which are now
exhaustively unit tested.
The set of fields that affect capacity waiting behavior has become a bit
of a mess. Next major release I'd like to rework all of these into a
more consistently named block of config. For now, just getting the
behavior correct and documented.
Fixes #4792