Karaf 2.4.0 build is failing with: Failed to execute goal org.apache.rat:apache-rat-plugin

The Karaf build is failing with the following error:

[ERROR] Failed to execute goal org.apache.rat:apache-rat-plugin:0.10:check (default) on project karaf: Too many files with unapproved license: 1 See RAT report in: /home/kearls/sources/jboss-fuse/karaf/target/karaf-2.4.0.redhat-SNAPSHOT.rat -> [Help 1]