BAC-941: GlobalFile domains

GlobalFile is not using wikia.nocookie.net on production env
Merge pull request #1935 from Wikia/bac-941-global-file

BAC-941: GlobalFile domains
CE-487 Extending functionality of wfWaitForSlaves
CE-487 wait for external shared DB to propagate user options to slave
Merge pull request #2119 from Wikia/CE-487-usersignup-slave-propagation

Ce 487 usersignup slave propagation