Fix skipping of static rewards

[Bushstar]

Summary

• Fix skipping of static rewards when consolidating rewards.
• Flush DB after consolidating rewards.
• Fix consolidate rewards test.
• Always set skip static when consolidating rewards, we never want them.
• Remove passing of workers as this is always from RewardConsolidationWorkersCount() which is called internally anyway.

Implications

• Storage

  • Database reindex required
  • Database reindex optional
  • Database reindex not required
  • None

• Consensus

  • Network upgrade required
  • Includes backward compatible changes
  • Includes consensus workarounds
  • Includes consensus refactors
  • None

[kuegi]

to prevent further default-value bugs and increase clarity: why not remove the default and have an explicit false on the calls?

[prasannavl]

Missed the comment above. Agree that default values are best avoided - usually not worth the cost of difficult to catch errors.