Fix detect_remote_translations for Legislation::Proposal

Legislation::Proposal is not Globalize model but use CommentableActions and try
detect remote translations. Add new condition to discard Non Globalize models.
This fix is necessary since the following commit was included: c1f3a4ad.

app/controllers/concerns/remotely_translatable.rb

@@ -16,7 +16,7 @@ module RemotelyTranslatable
     end
 
     def translation_empty?(resource)
-      resource.translations.where(locale: I18n.locale).empty?
+      resource.class.translates? && resource.translations.where(locale: I18n.locale).empty?
     end
 
     def resources_groups(*args)

spec/controllers/concerns/remotely_translatable_spec.rb

@@ -65,5 +65,13 @@ describe RemotelyTranslatable do
 
       expect(detect_remote_translations([proposal, comment])).to eq []
     end
+
+    it "When resource class is not translatable should not detect remote_translations" do
+      legislation_proposal = create(:legislation_proposal)
+
+      I18n.with_locale(:es) do
+        expect(detect_remote_translations([legislation_proposal])).to eq []
+      end
+    end
   end
 end