Add '.old' when renaming existing hooks directory

lib/gitlab_projects.rb

@@ -22,7 +22,7 @@ class GitlabProjects
   def self.create_hooks(path)
     local_hooks_directory = File.join(path, 'hooks')
     unless File.realpath(local_hooks_directory) == File.realpath(GLOBAL_HOOKS_DIRECTORY)
-      FileUtils.mv(local_hooks_directory, "#{local_hooks_directory}.#{Time.now.to_i}")
+      FileUtils.mv(local_hooks_directory, "#{local_hooks_directory}.old.#{Time.now.to_i}")
       FileUtils.ln_s(GLOBAL_HOOKS_DIRECTORY, local_hooks_directory)
     end
   end