WebUI: use python3-rjsmin to minify JavaScript files
Fedora 33+ deprecated uglify-js. There are other alternatives which seem
to be fine for the minify task. Use python-rjsmin instead.
Fixes: https://pagure.io/freeipa/issue/8300
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>