Update wct tests to use node modules instead of bower components. Change-Id: I1533279c9bc92b56b2de29070e6b2cc2137e7b06
Switching from bower to npm packages requires to use JavaScript rules for Bazel (rules_nodejs). This change adds rules_nodejs to gerrit and also adds empty package.json files for future usage. Change-Id: I09ee3e0ffbf1d185669c54cdb0db86760bfd35c8