## What changed?
Add simplePartitionScaler as a default partition scaler.
Default settings are not enabled, so still no change in behavior by
default.
## Why?
Next part of dynamic partitioning.
## How did you test it?
- [ ] built
- [ ] run locally and tested manually
- [ ] covered by existing tests
- [x] added new unit test(s)
- [ ] added new functional test(s) - covered by functional tests to be
added in future PR
07389de7d5