contrib/python3-whitelist

--- a/contrib/python3-whitelist	Sun Jul 08 18:52:28 2018 +0900
+++ b/contrib/python3-whitelist	Sun Jul 08 18:58:11 2018 +0900
@@ -36,6 +36,7 @@
 test-bundle-type.t
 test-bundle-vs-outgoing.t
 test-bundle.t
+test-bundle2-exchange.t
 test-bundle2-multiple-changegroups.t
 test-bundle2-pushback.t
 test-cappedreader.py