adapting tests to reduced rounding errors, refs #21

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16730 29f149b2-0c63-11e1-8f5c-a347f6a9acd0
reduce rounding errors, refs #12

git-svn-id: http://svn.code.sf.net/p/sumo/code/trunk/sumo@16731 29f149b2-0c63-11e1-8f5c-a347f6a9acd0