fix: wrong behavior of vote operation process

[wyuinche]

Pull-request Type (fix, feat, bug, doc, chore, test, etc...)

• fix

Current Behavior (Link to an open issue)

• vote operation not working
• VotingPowerBoxStateValue json unmarshal not working
• wrong field name in VotingPowerBoxStateValue bson

New Behavior (if this is a feature change)

• remove HasFieldValue from vote-operation processor
• fix VotingPowerBoxStateValue bson field name
• fix VotingPower unpack

[wyuinche]

@soonkuk please check. 👀