ADEN-1318 Remove extra function
ADEN-1318 Make AdConfig2Late using AdContext
ADEN-1318 WIP Refactor AdEngine to pass the ad context more explicitly
ADEN-1318 Stylize for more PHP files
ADEN-1318 More cleanup
ADEN-1318 CR update: reference constants by a class name
ADEN-1318 Re-adding the targeting by page categories
ADEN-1318 Fix the Mercury test
ADEN-1318 Fix top=1k param
Merge pull request #5090 from Wikia/aden-1318-pass-full-ad-context-from-backend

ADEN-1318 Refactor AdEngine to pass the ad context more explicitly (for Mercury and Venus)