Move EE-specific tasks to ee/lib/tasks

Signed-off-by: Rémy Coutable <remy@rymai.me>

config/application.rb

@@ -43,13 +43,9 @@ module Gitlab
     end
     config.eager_load_paths.concat(ee_paths)
 
-    config.paths['app/views'].concat(%W[
-      #{config.root}/ee/app/views
-    ])
-
-    config.helpers_paths.push(*%W[
-      #{config.root}/ee/app/helpers
-    ])
+    config.paths['lib/tasks'] << "#{config.root}/ee/lib/tasks"
+    config.paths['app/views'] << "#{config.root}/ee/app/views"
+    config.helpers_paths << "#{config.root}/ee/app/helpers"
 
     # Rake tasks ignore the eager loading settings, so we need to set the
     # autoload paths explicitly