Slightly modify fundrawtransaction.py test (change getnewaddress() into getrawchangeaddress())

test/functional/fundrawtransaction.py

@@ -646,7 +646,7 @@ class RawTransactionsTest(BitcoinTestFramework):
             if out['value'] > 1.0:
                 changeaddress += out['scriptPubKey']['addresses'][0]
         assert(changeaddress != "")
-        nextaddr = self.nodes[3].getnewaddress()
+        nextaddr = self.nodes[3].getrawchangeaddress()
         # frt should not have removed the key from the keypool
         assert(changeaddress == nextaddr)