Slashing reward recipient receives double rewards from Downtime and DoubleSigning

[lucasege]

Expected Behavior

Slashing reporter should receive reward worth of nonvoting lockedgold after a successful slash

Current Behavior

Slashing reporter will receive reward * 2 worth of nonvoting lockedgold.

Cause: SlasherUtil calls lockedgold.slash once on the "bad actor" and once on their group, both calls with the same recipient and reward, meaning recipient receives reward twice.

Proposed solution: easiest solution is to just make it clear that slashingIncentives.reward should be 1/2 of the proposed reward, or change setSlashingIncentives to set reward to 1/2 of the provided reward param.

[github-actions]

This issue is stale and will be closed in 30 days without activity