scripted-diff: test: Use py3.5 bytes::hex() method

-BEGIN VERIFY SCRIPT-
sed -i -e "s/def bytes_to_hex_str/def b_2_x/g" $(git grep -l bytes_to_hex_str)

export RE_B_0="[^()]*"                          # match no bracket
export RE_B_1="${RE_B_0}\(${RE_B_0}\)${RE_B_0}" # match exactly one ()
export RE_B_2="${RE_B_0}\(${RE_B_1}\)${RE_B_0}" # match wrapped (())

export RE_M="(b2x|bytes_to_hex_str)\(((${RE_B_0}|${RE_B_1}|${RE_B_2})*)\)"

sed -i --regexp-extended -e "s/${RE_M}/\2.hex()/g"      $(git grep -l -E '(b2x|bytes_to_hex_str)')

sed -i --regexp-extended -e "/  +bytes_to_hex_str( as b2x)?,/d"    $(git grep -l bytes_to_hex_str)
sed -i --regexp-extended -e "s/ +bytes_to_hex_str( as b2x)?,//g"   $(git grep -l bytes_to_hex_str)
sed -i --regexp-extended -e "s/, bytes_to_hex_str( as b2x)?//g"    $(git grep -l bytes_to_hex_str)

export RE_M="(binascii\.)?hexlify\(((${RE_B_0}|${RE_B_1}|${RE_B_2})*)\).decode\(${RE_B_0}\)"

sed -i --regexp-extended -e "s/${RE_M}/\2.hex()/g" $(git grep -l hexlify -- ':(exclude)share')

sed -i --regexp-extended -e  "/from binascii import hexlify$/d" $(git grep -l hexlify -- ':(exclude)share')
sed -i --regexp-extended -e "s/(from binascii import) .*hexlify/\1 unhexlify/g" $(git grep -l hexlify -- ':(exclude)share')

sed -i -e 's/ignore-names "/ignore-names "b_2_x,/g' ./test/lint/lint-python-dead-code.sh
-END VERIFY SCRIPT-

test/functional/test_framework/blocktools.py

@@ -20,7 +20,6 @@ from .messages import (
     CTxOut,
     FromHex,
     ToHex,
-    bytes_to_hex_str,
     hash256,
     hex_str_to_bytes,
     ser_string,
@@ -190,7 +189,7 @@ def witness_script(use_p2wsh, pubkey):
         witness_program = CScript([OP_1, hex_str_to_bytes(pubkey), OP_1, OP_CHECKMULTISIG])
         scripthash = sha256(witness_program)
         pkscript = CScript([OP_0, scripthash])
-    return bytes_to_hex_str(pkscript)
+    return pkscript.hex()
 
 def create_witness_tx(node, use_p2wsh, utxo, pubkey, encode_p2sh, amount):
     """Return a transaction (in hex) that spends the given utxo to a segwit output.