Add support for redis to Zaqar's lib

A new redis driver has landed in Zaqar. This patch adds support for that
driver to Zaqar's lib.

Change-Id: I97629a303c55ee098e3bfbc534bfb05ccab94649
diff --git a/files/apts/zaqar-server b/files/apts/zaqar-server
index bc7ef22..32b1017 100644
--- a/files/apts/zaqar-server
+++ b/files/apts/zaqar-server
@@ -1,3 +1,5 @@
 python-pymongo
 mongodb-server
 pkg-config
+redis-server # NOPRIME
+python-redis # NOPRIME
\ No newline at end of file