replace RAILS_ROOT to Rails.root in test/fixtures/repositories.yml.
replace RAILS_ROOT to Rails.root in test/test_helper.rb.
replace RAILS_ROOT to Rails.root in functional attachments controller test.
replace RAILS_ROOT to Rails.root in setting model.
replace RAILS_ROOT to Rails.root if functional application controller test.
replace RAILS_ROOT to Rails.root of attachments storage path.
Do not cache I18n strings when truncating a long diff (#5089).
Do not show inactive time entry activities in repository settings (#8573).
Do not show inactive document categories where not necessary (#8573).
Do not show inactive issue priorities where not necessary (#8573).
