Add Redis Mock -- tested and working

server/lib/python/cartodb_services/cartodb_services/refactor/tools/redis_mock.py

@@ -0,0 +1,8 @@
+class RedisConnectionMock(object):
+    """ Simple class to mock a dummy behaviour for Redis related functions """
+
+    def zscore(self, redis_prefix, day):
+        pass
+
+    def zincrby(self, redis_prefix, day, amount):
+        pass