[CSL-195] Fix Crypto.checkProxySecretKey + tests
[CSL-195] Fix Crypto.checkProxySecretKey + tests

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