Use system specs instead of feature specs

We get rid of database cleaner, and JavaScript tests are faster because
between tests we now rollback transactions instead of truncating the
database.

spec/system/verification/level_two_verification_spec.rb

@@ -0,0 +1,40 @@
+require "rails_helper"
+
+describe "Level two verification" do
+  scenario "Verification with residency and sms" do
+    create(:geozone)
+    user = create(:user)
+    login_as(user)
+
+    visit account_path
+    click_link "Verify my account"
+
+    verify_residence
+
+    fill_in "sms_phone", with: "611111111"
+    click_button "Send"
+
+    expect(page).to have_content "Security code confirmation"
+
+    user = user.reload
+    fill_in "sms_confirmation_code", with: user.sms_confirmation_code
+    click_button "Send"
+
+    expect(page).to have_content "Code correct"
+  end
+
+  context "In Spanish, with no fallbacks" do
+    before do
+      skip unless I18n.available_locales.include?(:es)
+      allow(I18n.fallbacks).to receive(:[]).and_return([:es])
+    end
+
+    scenario "Works normally" do
+      user = create(:user)
+      login_as(user)
+
+      visit verification_path(locale: :es)
+      verify_residence
+    end
+  end
+end