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

[Debian testing autoremoval watch]

gitlab 8.13.11+dfsg1-11 is marked for autoremoval from testing on 2017-09-13

It (build-)depends on packages with these RC bugs:
867645: ruby-influxdb: FTBFS: ERROR: Test "ruby2.3" failed: Failure/Error: http.request(req)
867649: ruby-flowdock: FTBFS: ERROR: Test "ruby2.3" failed: Failure/Error: resp = self.class.delete(api_url(path), :basic_auth => {:username => @api_token, :password => ''}, :headers => headers)
867654: ruby-omniauth-crowd: FTBFS: ERROR: Test "ruby2.3" failed: Failure/Error: http.request(req)
867655: ruby-gemnasium-gitlab-service: FTBFS: ERROR: Test "ruby2.3" failed: Failure/Error: @connection.request(request)
868750: ruby-sham-rack: ruby-sham-rack FTBFS: test failures