[CSL-616] Pass ChainDifficulty to verifyAndApplyVote
[CSL-616] Pass ChainDifficulty to verifyAndApplyVote

input-output-hk/pos-haskell-prototype,input-output-hk/pos-haskell-prototype,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/cardano-sl