Added facebookAppId to wikiVariables
Merge branches 'HG-463' and 'dev' of https://github.com/Wikia/app into HG-463
Fix ReplaceImageServerTest failing

Mock wgEnableVignette correctly
GlobalFileTest: mock wgEnableVignette set to false
Merge pull request #5844 from Wikia/PLATFORM-680-GlobalFileTest-fix

PLATFORM-680 - GlobalFileTest: mock wgEnableVignette set to false
Merge pull request #5843 from Wikia/PLATFORM-679-ReplaceImageServerTest-fix

PLATFORM-679 - fix ReplaceImageServerTest failing
ServiceTest: fix AvatarService unit test
AvatarServiceTest: modify unit tests to be compatible with Vignette URL schema
AvatarServiceTest: always use Vignette in this test
Merge pull request #5851 from Wikia/vignette-fix-unit-tests

Vignette fix unit tests
Merge pull request #5846 from Wikia/HG-463

Open graph tags for Mercury
Merge branch 'dev' into uconn-4
Merge branch 'uconn-4' into UC-188