CON-1239 | loading all languages which are in WAM for a specific day for filters
CON-1239 | added back what was unnecessarily cut
CON-1239 | fixed MySQL query
CON-1239 | fixed fetching non-existent data
CON-1239 | removed forgotten var_dump and few comments
CON-1239 | first fix iteration after CR: removed WAMPageModel::getCorporateWikisLanguages() method, removed mocked data for dev env and the switches, updated WAMApiController::getWAMLanguages() DocBlock and swagger, removed debugging code, changed MySQL query to use FROM_UNIXTIME(), swiched to caching with no lock
CON-1239 | second fix iteration after CR: added date validation in WAMApiController::getWAMLanguages(), removed possibility to create cache key containing nullin WAMService::getWAMLanguages(), made changes to WAMApi.swagger.php
CON-1239 | fixed MySQL query (some wikis gave NULLs)
Merge pull request #3909 from Wikia/CON-1239

CON-1239 | New languages for filtering WAM page