fixed issue https://github.com/restlet/restlet-framework-java/issues/830.
Merge branch 'master' of github.com:restlet/restlet-sites
Merge branch 'master' of github.com:restlet/restlet-sites
Merge branch 'master' of github.com:restlet/restlet-sites
Released Restlet 2.1.7 and 2.2rc1.wq