fixing time and loop handling in jtrrouter, refs #507

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16624 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
adding and fixing jtrrouter tests, refs #21, #507

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16625 29f149b2-0c63-11e1-8f5c-a347f6a9acd0