The Evict extension point is not currently in use.
All DefaultEvictor plugin functionality is exposed through Filter and
PreEvictionFilter extension points instead.
Thus, no need to limit the number of evictors enabled.
- Populate extension points automatically from plugin types
- Make a list of enabled extension points based on a profile
configuration
- Populate filter and pre-eviction filter handles from their
corresponding extension points
* Descheduling profile
* Fake plugin + profile unit testing
* Rename Profile config type into DeschedulerProfile
To avoid resamblance with profileImpl
* First run deschedule, then balance extension points
