stop using deprecated methods internally

Author: Aaron Patterson and Terence Lee

lib/resque.rb

@@ -101,8 +101,9 @@ def coder
   # create a new one.
   def redis
     return @redis if @redis
-    self.redis = Redis.respond_to?(:connect) ? Redis.connect(:thread_safe => true) : "localhost:6379"
-    self.redis
+    redis = Redis.respond_to?(:connect) ? Redis.connect(:thread_safe => true) : "localhost:6379"
+    create_pool(redis)
+    @redis
   end
 
   def pool