[DRE-maint] gitlab is marked for autoremoval from testing

[Debian testing autoremoval watch]

gitlab 8.4.3+dfsg-9 is marked for autoremoval from testing on 2016-03-25

It (build-)depends on packages with these RC bugs:
808450: ruby-sanitize: FTBFS: Config::DEFAULT#test_0009_should clean malicious HTML [/build/ruby-sanitize-2.1.0/test/test_sanitize.rb:213]:
813746: ruby-hipchat: FTBFS: Real HTTP connections are disabled. Unregistered request: GET
814311: ruby-omniauth-crowd: FTBFS: Failures: OmniAuth::Strategies::Crowd GET /auth/crowd/callback with credentials will fail should fail
814645: ruby-mousetrap-rails: unhandled symlink to directory conversion: /usr/share/ruby-mousetrap-rails/vendor/assets/javascripts/mousetrap