Clean up imports to be pyflakes-checkable. fixes #2450

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

qa/rpc-tests/fundrawtransaction.py

@@ -4,9 +4,12 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import *
-from pprint import pprint
-from time import sleep
+from test_framework.authproxy import JSONRPCException
+from test_framework.util import assert_equal, assert_greater_than, \
+    initialize_chain_clean, start_nodes, connect_nodes_bi, stop_nodes, \
+    wait_bitcoinds
+
+from decimal import Decimal
 
 # Create one-input, one-output, no-fee transaction:
 class RawTransactionsTest(BitcoinTestFramework):