Add spec for translated budget poll name

This spec fails if we remove the attribute `name` from `poll_params` in
the `Admin::Poll::PollsController`, which we would usually remove
because it's a translatable attribute.

spec/features/budget_polls/budgets_spec.rb

@@ -27,6 +27,24 @@ describe "Admin Budgets" do
       expect(Poll.last.budget).to eq(budget)
     end
 
+    scenario "Create poll in current locale if the budget does not have a poll associated", :js do
+      budget = create(:budget,
+                      name_en: "Budget for climate change",
+                      name_fr: "Budget pour le changement climatique")
+
+
+      visit admin_budgets_path
+      select("Français", from: "locale-switcher")
+
+      click_link "Bulletins de l’admin"
+
+      expect(current_path).to match(/admin\/polls\/\d+/)
+      expect(page).to have_content("Budget pour le changement climatique")
+
+      expect(Poll.count).to eq(1)
+      expect(Poll.last.budget).to eq(budget)
+    end
+
     scenario "Display link to poll if the budget has a poll associated" do
       budget = create(:budget)
       poll = create(:poll, budget: budget)