Collection walk method bug fix when specific callback function

[jalogut]

When a specific class is set as callback on a collection->walk, it works only for the first item in the collection. The problem is that array_unshift modifies directly the value of $args adding the $item object at the beginning. That works well for the first iteration but after that $args grow and grow keeping previous $item objects from previous iterations.

How to test:

Just try an a collection->walk with more than 1 item. Only the callback for the first element is successful.

$this->objectCollection
    ->addFieldToFilter('id', array('in' => array(1,2,3)))
    ->walk(array($this, 'saveCollection'), array('value'));

[magento-cicd2]

All committers have signed the CLA.

[orlangur]

What needs to be ignored here?

[jalogut]

Nothing, I was just getting a warning that you should not use "call_user_func_array". I removed these coding standard ignores

[magento-team]

@jalogut Thank you for the contribution