Add CORS helper and usage in Wikis and Article APIs
switch to using WikiaResponse object
fix implementation and tests
fix default value and remove spurious space
Fix ugly bug
DAT-2035 fix for not existing title
DAT-2035 logging added
DAT-2035 readability improved
Merge pull request #5021 from Wikia/DAT-2021

DAT-2021 Add CORS helper and usage in Wikis and Article APIs
Merge pull request #5086 from Wikia/DAT-2035

DAT-2035 fix for not existing title