BugId:98435 Fix for ImageServing not indexing images for articles thumbn...

...ails

Maintenance script for indexing images from articles wasn't catching images from galleries.

mImages field seems to be always empty and actually images are returned by method WikiaPhotoGallery::getData.

I changed this part of ImageServingHelper to use images returned by getData method.

I also made two test runs on muppet. One using mImages field one getData method. All what was found by first run was also found in the second run.