Set the ads context from Wikia ns
Fixed comments, formatting
Merge pull request #4661 from Wikia/HG-102-use-wikia-ns-context

Set the ads context from Wikia NS
Merge branch 'mercury' into HG-102

Conflicts:
	extensions/wikia/MercuryApi/MercuryApiController.class.php
Merge branch 'mercury' into HG-102

Conflicts:
	extensions/wikia/MercuryApi/MercuryApiController.class.php
Merge pull request #4706 from Wikia/HG-102

HG-102