Fix unit tests for python3x (use bytes literal for faked chain code).
Fix unit tests for python3x (use bytes literal for faked chain code).

richardkiss/pycoin,shivaenigma/pycoin,XertroV/pycoin,Magicking/pycoin,Kefkius/pycoin,mperklin/pycoin,antiface/pycoin,devrandom/pycoin,thirdkey-solutions/pycoin,antiface/pycoin,shayanb/pycoin,shayanb/pycoin,Pan0ram1x/pycoin,moocowmoo/pycoin,richardkiss/pycoin,ptcrypto/pycoin,tomholub/pycoin,shivaenigma/pycoin,mperklin/pycoin,Magicking/pycoin,thirdkey-solutions/pycoin,XertroV/pycoin,moocowmoo/pycoin,zsulocal/pycoin,tomholub/pycoin,pycoin/pycoin,gitonio/pycoin,pycoin/pycoin,Pan0ram1x/pycoin,devrandom/pycoin,Kefkius/pycoin,zsulocal/pycoin,ptcrypto/pycoin,gitonio/pycoin