Promote multibulk response iterators as Predis response objects.

Multibulk response iterators will not be passed anymore to the response
parser method of the command that generated the response. Pipeline and
transaction abstractions still consume interators returned as response
items.

lib/Predis/Command/ServerConfig.php

@@ -11,8 +11,6 @@
 
 namespace Predis\Command;
 
-use Predis\Iterator\MultiBulkResponseTuple;
-
 /**
  * @link http://redis.io/commands/config-set
  * @link http://redis.io/commands/config-get
@@ -34,10 +32,6 @@ class ServerConfig extends AbstractCommand
      */
     public function parseResponse($data)
     {
-        if ($data instanceof \Iterator) {
-            return new MultiBulkResponseTuple($data);
-        }
-
         if (is_array($data)) {
             $result = array();