Temporarily update to rat-maven-plugin SNAPSHOT

Since the problem with RAT-215 only manifests itself on Jenkins and I
was unable to reproduce it by fiddling with -Dfile.encoding I am
temporarily using a SNAPSHOT version to validate the fix.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1736173 13f79535-47bb-0310-9956-ffa450edef68
1 file changed