fixing external revisions, refs #563

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@15883 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
unfixing externals, refs #563

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@15885 29f149b2-0c63-11e1-8f5c-a347f6a9acd0