Fix bug for merge_requests_enabled
Fix bug for merge_requests_enabled

preflight check did not properly test it.

sbellver/gitlab-mirrors,logicminds/gitlab-mirrors,mahajanankur/gitlab-mirrors,mahajanankur/gitlab-mirrors,samrocketman/gitlab-mirrors,samrocketman/gitlab-mirrors,logicminds/gitlab-mirrors,sbellver/gitlab-mirrors