Model download from studio takes model file from datamart.jar, if not found from resources

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi@23204 99afaf0d-6903-0410-885a-c66a8bbb5f81
git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi@23205 99afaf0d-6903-0410-885a-c66a8bbb5f81
git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi@23206 99afaf0d-6903-0410-885a-c66a8bbb5f81