Merge branch 'remove-relative-call-from-finder' into 'master'

Remove unnecessary require_relative calls from finder

Rails add all from app to autoload. See https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7601

See merge request !7768

app/finders/issuable_finder.rb

@@ -16,8 +16,6 @@
 #     label_name: string
 #     sort: string
 #
-require_relative 'projects_finder'
-
 class IssuableFinder
   NONE = '0'