console cmd index action - use global namespace for provider and iterato...

We should use global namespaces in the ConsoleCommand's index action otherwise we get a file missing php error:

````
0% PHP Error[2]: include([...]\common\lib\vendor\codemix\yiielasticsearch\src\YiiElasticSearch\CDataProviderIterator.php): failed to open stream: No such file or directory
    in file [...]\common\lib\vendor\yiisoft\yii\framework\YiiBase.php at line 433
````

It is connected to the Issue #23: Use iterator for index command