Don't include unneeded helpers in tests

Including them might lead to conflicts since two methods might have the
same name. For example, we're getting some exceptions when taking
screenshots of a failing test, because the method `image_path` from
`ActionView::Helpers::AssetUrlHelper` has the same name as a method used
to save the screenshot.

Besides, we were including all helpers in places were only the `dom_id`
method is used, and in other places where no helper methods were used at
all. So we can just invoke `ActionView::RecordIdentifier.dom_id`
directly.

spec/features/comments/budget_investments_spec.rb

@@ -1,5 +1,4 @@
 require "rails_helper"
-include ActionView::Helpers::DateHelper
 
 describe "Commenting Budget::Investments" do
   let(:user) { create :user }

spec/features/comments/debates_spec.rb

@@ -1,5 +1,4 @@
 require "rails_helper"
-include ActionView::Helpers::DateHelper
 
 describe "Commenting debates" do
   let(:user)   { create :user }

spec/features/comments/legislation_annotations_spec.rb

@@ -1,5 +1,4 @@
 require "rails_helper"
-include ActionView::Helpers::DateHelper
 
 describe "Commenting legislation questions" do
   let(:user) { create :user }

spec/features/comments/legislation_questions_spec.rb

@@ -1,5 +1,4 @@
 require "rails_helper"
-include ActionView::Helpers::DateHelper
 
 describe "Commenting legislation questions" do
   let(:user) { create :user, :level_two }

spec/features/comments/polls_spec.rb

@@ -1,5 +1,4 @@
 require "rails_helper"
-include ActionView::Helpers::DateHelper
 
 describe "Commenting polls" do
   let(:user) { create :user }

spec/features/comments/proposals_spec.rb

@@ -1,5 +1,4 @@
 require "rails_helper"
-include ActionView::Helpers::DateHelper
 
 describe "Commenting proposals" do
   let(:user) { create :user }

spec/features/comments/topics_spec.rb

@@ -1,5 +1,4 @@
 require "rails_helper"
-include ActionView::Helpers::DateHelper
 
 describe "Commenting topics from proposals" do
   let(:user)     { create :user }

spec/shared/features/documentable.rb

@@ -1,6 +1,4 @@
 shared_examples "documentable" do |documentable_factory_name, documentable_path, documentable_path_arguments|
-  include ActionView::Helpers
-
   let(:administrator) { create(:user) }
   let(:user)          { create(:user) }
   let(:arguments)     { {} }
@@ -134,7 +132,7 @@ shared_examples "documentable" do |documentable_factory_name, documentable_path,
         click_on "Delete document"
       end
 
-      within "##{dom_id(documentable)}" do
+      within "##{ActionView::RecordIdentifier.dom_id(documentable)}" do
         expect(page).to have_selector "h1", text: documentable.title
       end
     end

spec/shared/features/followable.rb

@@ -1,10 +1,12 @@
 shared_examples "followable" do |followable_class_name, followable_path, followable_path_arguments|
-  include ActionView::Helpers
-
   let!(:arguments) { {} }
   let!(:followable) { create(followable_class_name) }
   let!(:followable_dom_name) { followable_class_name.tr("_", "-") }
 
+  def dom_id(record)
+    ActionView::RecordIdentifier.dom_id(record)
+  end
+
   before do
     followable_path_arguments.each do |argument_name, path_to_value|
       arguments.merge!("#{argument_name}": followable.send(path_to_value))

spec/shared/features/imageable.rb

@@ -1,8 +1,4 @@
 shared_examples "imageable" do |imageable_factory_name, imageable_path, imageable_path_arguments|
-  include ActionView::Helpers
-  include ImagesHelper
-  include ImageablesHelper
-
   let!(:administrator)          { create(:user) }
   let!(:user)                   { create(:user) }
   let!(:imageable_arguments)    { {} }

spec/shared/features/mappable.rb

@@ -1,6 +1,4 @@
 shared_examples "mappable" do |mappable_factory_name, mappable_association_name, mappable_new_path, mappable_edit_path, mappable_show_path, mappable_path_arguments, management: false|
-  include ActionView::Helpers
-
   let!(:user)         { create(:user, :level_two) }
   let!(:arguments)    { {} }
   let!(:mappable)     { create(mappable_factory_name.to_s.to_sym) }

spec/shared/features/nested_documentable.rb

@@ -1,8 +1,4 @@
 shared_examples "nested documentable" do |login_as_name, documentable_factory_name, path, documentable_path_arguments, fill_resource_method_name, submit_button, documentable_success_notice|
-  include ActionView::Helpers
-  include DocumentsHelper
-  include DocumentablesHelper
-
   let!(:administrator)          { create(:user) }
   let!(:user)                   { create(:user, :level_two) }
   let!(:arguments)              { {} }

spec/shared/features/nested_imageable.rb

@@ -1,8 +1,4 @@
 shared_examples "nested imageable" do |imageable_factory_name, path, imageable_path_arguments, fill_resource_method_name, submit_button, imageable_success_notice, has_many_images = false|
-  include ActionView::Helpers
-  include ImagesHelper
-  include ImageablesHelper
-
   let!(:user)                { create(:user, :level_two) }
   let!(:administrator)       { create(:administrator, user: user) }
   let!(:arguments)           { {} }

spec/shared/models/image_validations.rb

@@ -1,5 +1,4 @@
 shared_examples "image validations" do |imageable_factory|
-  include ImagesHelper
   include ImageablesHelper
 
   let!(:image)                  { build(:image, imageable_factory.to_sym) }