Unquarantine object storage test

--compat mode in Minio is now enabled so this test should pass
See https://gitlab.com/gitlab-org/gitlab-qa/merge_requests/260

qa/qa/specs/features/browser_ui/2_plan/issue/create_issue_spec.rb

@@ -13,8 +13,7 @@ module QA
         expect(page).to have_content(issue_title)
       end
 
-      # Failure issue: https://gitlab.com/gitlab-org/quality/nightly/issues/101
-      context 'when using attachments in comments', :object_storage, :quarantine do
+      context 'when using attachments in comments', :object_storage do
         let(:file_to_attach) do
           File.absolute_path(File.join('spec', 'fixtures', 'banana_sample.gif'))
         end