move "Install node modules" step before "Migrate DB" within update process

lib/gitlab/upgrader.rb

@@ -60,8 +60,8 @@ module Gitlab
         "Get latest code" => %W(#{Gitlab.config.git.bin_path} fetch),
         "Switch to new version" => %W(#{Gitlab.config.git.bin_path} checkout v#{latest_version}),
         "Install gems" => %W(bundle),
-        "Migrate DB" => %W(bundle exec rake db:migrate),
         "Install node modules" => %W(npm install --production),
+        "Migrate DB" => %W(bundle exec rake db:migrate),
         "Recompile assets" => %W(bundle exec rake gitlab:assets:clean gitlab:assets:compile),
         "Clear cache" => %W(bundle exec rake cache:clear)
       }