testing: add fake implementation of redis conn
testing: use RedisCommand instead of Command for type name
router/hipache: use FakeRedisConn from testing package
testing/redis: move code from testing package
router/hipache: fix tests
queue/redis: stop using redismq package

We had lots of trouble with this child. Let's just talk to redis
directly.

Fix #717.
Godeps: remove adeven/redismq dependency
Godeps: remove iam