Use the (collected) history on per-node failures to tune placement requests, so that even if there's a history of components running there, if its been failing recently then it's not asked for
- Add a "recent failures" field to the node entries, alongside the "total failures" counter
- the scheduled failure count resetter will set that field to zero,alongside the component failures
- When Slider has to request a new container, if a node has a recent failure count above some threshold, it will not be requested, even if it is a past location of that component.
When the placement policy is STRICT, node failure history will not be taken into account