Update slingshot sample

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1631368 13f79535-47bb-0310-9956-ffa450edef68
remove exclusion no longer required

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1631372 13f79535-47bb-0310-9956-ffa450edef68