VE-601: Tolerate interwikis without  placeholder; https://gerrit.wikimedia.org/r/#/c/102612/
Merge pull request #22 from Wikia/VE-601

VE-601: Tolerate interwikis without placeholder
VE-352: VE on Internal Wiki
code review feedback
code review feedback
Delete not needed property instead of setting it to null
Merge pull request #23 from Wikia/VE-352

VE-352: VE on Internal Wiki
Merge branch 'master' into deploy