Download “apache-rat-0.11-bin.zip” from http://creadur.apache.org/rat/download_rat.cgi and unpack it to “extern-modules/apache-rat-0.11”

“apache-rat-0.11.jar” must be located in ./extern-modules/apache-rat-0.11/apache-rat-0.11.jar ( full path from git root /odatajs/grunt-config/custom-tasks/rat/extern-modules/apache-rat-0.11/apache-rat-0.11.jar)