Those files are used when running WebUI unit tests from command line.
- Gruntfile specifies grunt task which can run the webui tests.
- symlink to src/freeipa/package.json where are specified npm packages
which are required for running those test.
There is only symlink to not duplicite package.json file
Related: https://pagure.io/freeipa/issue/7278
Reviewed-By: Christian Heimes <cheimes@redhat.com>
