WikiaApiController::setResponseData - improve PHPDoc
Register RecommendationsApiController
RecommendationsApi: use "id" param + use "items" root element
Remove getRecommendations placeholder
RecommendationsApi: validate the articleId + check if article exists
Recommendations: rename Api to Collector
Collector: add a longer PHP tag
RecommendationsApiController: use NotFoundApiException
Merge pull request #5312 from Wikia/CON-2089-expose-recommendations-api

CON-2089: expose Recommendations APi