Added no_contributor_info route to show flash notice thank you

To give thank you for contributor who did not leave their info.

app/controllers/contributors_controller.rb

@@ -15,6 +15,11 @@ def create
     end
   end
 
+  def no_contributor_info
+    flash[:notice] = "Thank you"
+    redirect_to root_url
+  end
+
   private
 
   def contributor_params

app/views/contributors/new.html.haml

@@ -17,4 +17,4 @@
         = f.text_field :email
     %p.button
       = f.submit "Submit"
-    = link_to "I prefer not to", root_url
+    = link_to "I prefer not to", contributors_no_info_path

config/routes.rb

@@ -111,6 +111,7 @@ def matches?(request)
   post "/authorities/:authority_id/councillor_contributions/new", to: "councillor_contributions#new"
 
   resources :contributors, only:[:new, :create]
+    get "/contributors/no_info", to: "contributors#no_contributor_info"
 
   namespace :atdis do
     get :test