def: 6524 when activating only player cuepoints, leave "swfUrls" attribute on "overlay" plugin node

git-svn-id: svn+ssh://kelev.kaltura.com/usr/local/kalsource/front/workspaces/kmc/trunk@92689 6b8eccd3-e8c5-4e7d-8186-e12b5326b719