[CSL-1669] Clarify types in 'genesisUtxo'
[CSL-1669] Clarify types in 'genesisUtxo'

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