Change namespace for defaults controllers

To allow proper path prefix for view partials when using
config.action_view.prefix_partial_path_with_controller_namespace

config/routes.rb

@@ -8,8 +8,8 @@ Rails.application.routes.draw do
     end
   end
 
-  namespace :units do
-    resources :defaults, only: :index
+  namespace :default do
+    resources :units, only: :index
   end
 
   resources :users, only: [:index, :show, :update] do