message: Fix fundrawtransaction python test
diff: @@ -201,9 +201,9 @@ class RawTransactionsTest(BitcoinTestFramework):
  try:
  self.nodes[2].fundrawtransaction(rawtx, {'changeAddress': 'foobar'})
  - raise AssertionError("Accepted invalid bitcoin address")
  + raise AssertionError("Accepted invalid qtum address")
  except JSONRPCException as e:
  - assert("changeAddress must be a valid bitcoin address" in e.error['message'])
  + assert("changeAddress must be a valid qtum address" in e.error['message'])
  ############################################################
  