Added asyntest requirement.

modoboa/policyd/tests.py

@@ -1,7 +1,8 @@
 """Policy daemon related tests."""
 
 import asyncio
-from mock import patch
+# from mock import patch
+from asynctest import patch
 from multiprocessing import Process
 import socket
 import time

test-requirements.txt

@@ -3,3 +3,4 @@ factory-boy>=2.4
 httmock==1.3.0
 testfixtures==6.10.3
 tox
+asynctest