- Move cooldown check inside pre-op of scaling policy. Cooldown only
applies to scaling policy so it doesn't make sense to check it for all
the other policies.
- Move last_op update into post_op of scaling policy.
- Change policy_check for scaling policy to pass for AFTER if action is
either scale out or scale in. This allows the post_op of the scaling
policy to be called and the last_op to be updated for either scaling action.
Closes-Bug: 1795503
Change-Id: I043cb2b67648c5767d00aca05b8d0825a6a371dc