fix DirtyReactor exception in tests by calling FakeRedis.teardown()
fix DirtyReactor exception in tests by calling FakeRedis.teardown()

harrissoerja/vumi,TouK/vumi,vishwaprakashmishra/xmatrix,TouK/vumi,vishwaprakashmishra/xmatrix,vishwaprakashmishra/xmatrix,harrissoerja/vumi,harrissoerja/vumi,TouK/vumi