Reduce CE/EE diff in spec/controllers/projects/boards_controller_spec.rb

Signed-off-by: Rémy Coutable <remy@rymai.me>

spec/controllers/projects/boards_controller_spec.rb

@@ -45,8 +45,7 @@ describe Projects::BoardsController do
 
     context 'when format is JSON' do
       it 'returns a list of project boards' do
-        create(:board, project: project, milestone: create(:milestone, project: project))
-        create(:board, project: project, milestone_id: Milestone::Upcoming.id)
+        create_list(:board, 2, project: project)
 
         list_boards format: :json