gerrit: configure for feature branch development
gerrit: configure for feature branch development

Bug: T181353
Change-Id: I3acb4cffd286246d6ba52e259ae42fa99a8bac62

wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant,wikimedia/mediawiki-vagrant