Monetization (MON-93): MonetizationModule - added theme settings to ads

This logic may have to be done again [above at this line](https://github.com/Wikia/app/blob/MON-93/extensions/wikia/MonetizationModule/MonetizationModuleHelper.class.php#L88) as well.

Now I'm rethinking this...should this happen in the service? It would simplify all of the caching logic - if there is something set use it. Otherwise call to get it...