fixing leftover in socket retrieval, refs #21

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16720 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
more sim routing tests, refs #21

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16721 29f149b2-0c63-11e1-8f5c-a347f6a9acd0