Add test for fetching a missing key from redis.
Add test for fetching a missing key from redis.

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