Ownership sets may conflict with working sets

[improbable-dmitrii]

Description

Working sets and ownership sets are two separate systems, and both may influence load balancing when using StrategyWorker. When that happens, one may experience issues such as ownership sets being broken.

Expected behavior

Working sets and ownership sets should be integrated so none are broken at any time.

Current behavior

An entity may be a member of conflicting working and ownership sets, each requesting it be put on different partitions.

Possible solution

Implement ownership sets in terms of working sets.