don't special case on Redis::Namespace.

We should not have conditionals based on whether or not we're using
Redis::Namespace.  Always treat the connection like a normal connection
(Redis::Namespace should be transparent).

Author: tenderlove

lib/resque/multi_queue.rb

@@ -19,9 +19,7 @@ def initialize(queues, redis = Resque.redis)
       @redis      = redis
 
       queues.each do |queue|
-        key = @redis.is_a?(Redis::Namespace) ? "#{@redis.namespace}:" : ""
-        key += queue.redis_name
-        @queue_hash[key] = queue
+        @queue_hash[queue.redis_name] = queue
       end
     end