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

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

qa/rpc-tests/test_framework/test_framework.py

@@ -13,8 +13,11 @@ import shutil
 import tempfile
 import traceback
 
-from authproxy import AuthServiceProxy, JSONRPCException
-from util import *
+from authproxy import JSONRPCException
+from util import assert_equal, check_json_precision, \
+    initialize_chain, initialize_chain_clean, \
+    start_nodes, connect_nodes_bi, stop_nodes, \
+    sync_blocks, sync_mempools, wait_bitcoinds
 
 
 class BitcoinTestFramework(object):